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Aula grátisThe suffix -idad forms feminine nouns expressing quality, state, or condition from an adjective: capaz (capable) → capacidad (capacity), feliz (happy) → felicidad (happiness). It's the most productive variant of the -dad family in modern Spanish — combining mainly with adjectives ending in -al, -ar, -ico, -ivo, -oso, and -ble — so this is an open paradigm: the list gathers the most frequent and useful formations, not every possible one.
| # | Spanish Noun | Noun in English | Base Adjective | Base Adjective in English |
|---|---|---|---|---|
| 1 | realidad | reality | real | real |
| 2 | posibilidad | possibility | posible | possible |
| 3 | seguridad | safety; security; certainty | seguro | safe; secure; certain |
| 4 | capacidad | capacity; ability | capaz | capable |
| 5 | responsabilidad | responsibility | responsable | responsible |
| 6 | actividad | activity | activo | active |
| 7 | felicidad | happiness | feliz | happy |
| 8 | facilidad | ease; facility | fácil | easy |
| 9 | casualidad | chance; coincidence | casual | accidental; casual |
| 10 | nacionalidad | nationality | nacional | national |
| 11 | personalidad | personality | personal | personal |
| 12 | actualidad | present time; current affairs | actual | current |
| 13 | normalidad | normality | normal | normal |
| 14 | estabilidad | stability | estable | stable |
| 15 | disponibilidad | availability | disponible | available |
| 16 | modalidad | modality; form; type | modal | modal |
| 17 | mentalidad | mentality; mindset | mental | mental |
| 18 | utilidad | usefulness; utility | útil | useful |
| 19 | creatividad | creativity | creativo | creative |
| 20 | productividad | productivity | productivo | productive |
| 21 | sensibilidad | sensitivity | sensible | sensitive |
| 22 | popularidad | popularity | popular | popular |
| 23 | sinceridad | sincerity | sincero | sincere |
| 24 | claridad | clarity | claro | clear |
| 25 | profundidad | depth; profundity | profundo | deep; profound |
| 26 | velocidad | speed; velocity | veloz | fast; swift |
| 27 | curiosidad | curiosity | curioso | curious |
| 28 | continuidad | continuity | continuo | continuous |
| 29 | diversidad | diversity | diverso | diverse |
| 30 | flexibilidad | flexibility | flexible | flexible |
| 31 | legalidad | legality | legal | legal |
| 32 | identidad | identity | idéntico | identical |
| 33 | privacidad | privacy | privado | private |
| 34 | solidaridad | solidarity | solidario | supportive; solidary |
| 35 | tranquilidad | tranquility; calm | tranquilo | calm; peaceful |
| 36 | dignidad | dignity | digno | worthy; dignified |
| 37 | generosidad | generosity | generoso | generous |
| 38 | familiaridad | familiarity | familiar | familiar |
| 39 | originalidad | originality | original | original |
| 40 | totalidad | totality; entirety | total | total |
| 41 | vitalidad | vitality | vital | vital; lively |
| 42 | mortalidad | mortality | mortal | mortal |
| 43 | finalidad | purpose; aim | final | final |
| 44 | formalidad | formality; seriousness | formal | formal |
| 45 | probabilidad | probability | probable | probable; likely |
| 46 | visibilidad | visibility | visible | visible |
| 47 | rentabilidad | profitability | rentable | profitable |
| 48 | compatibilidad | compatibility | compatible | compatible |
| 49 | viabilidad | viability; feasibility | viable | viable; feasible |
| 50 | accesibilidad | accessibility | accesible | accessible |
| 51 | credibilidad | credibility | creíble | credible; believable |
| 52 | amabilidad | kindness; friendliness | amable | kind; friendly |
| 53 | culpabilidad | guilt; culpability | culpable | guilty; culpable |
| 54 | habilidad | ability; skill | hábil | skillful; capable |
| 55 | debilidad | weakness | débil | weak |
| 56 | fragilidad | fragility | frágil | fragile |
| 57 | agilidad | agility | ágil | agile |
| 58 | fertilidad | fertility | fértil | fertile |
| 59 | imbecilidad | stupidity; foolishness | imbécil | foolish; stupid |
| 60 | intensidad | intensity | intenso | intense |
| 61 | densidad | density | denso | dense |
| 62 | caducidad | expiration; expiry | caduco | expired; obsolete |
| 63 | fecundidad | fecundity; productiveness | fecundo | fertile; productive |
| 64 | salubridad | healthfulness; salubrity | salubre | healthful |
| 65 | autenticidad | authenticity | auténtico | authentic |
| 66 | especificidad | specificity | específico | specific |
| 67 | elasticidad | elasticity | elástico | elastic |
| 68 | toxicidad | toxicity | tóxico | toxic |
| 69 | luminosidad | luminosity; brightness | luminoso | luminous; bright |
| 70 | peligrosidad | dangerousness; hazard level | peligroso | dangerous |
| 71 | religiosidad | religiosity; religious devotion | religioso | religious |
| 72 | objetividad | objectivity | objetivo | objective |
| 73 | subjetividad | subjectivity | subjetivo | subjective |
| 74 | relatividad | relativity | relativo | relative |
| 75 | competitividad | competitiveness | competitivo | competitive |
| 76 | efectividad | effectiveness | efectivo | effective |
| 77 | agresividad | aggressiveness | agresivo | aggressive |
| 78 | emotividad | emotionality | emotivo | emotional |
| 79 | exclusividad | exclusivity | exclusivo | exclusive |
| 80 | pasividad | passivity | pasivo | passive |
| 81 | negatividad | negativity | negativo | negative |
| 82 | selectividad | selectivity | selectivo | selective |
| 83 | singularidad | singularity; uniqueness | singular | singular; unique |
| 84 | particularidad | particularity; distinctive feature | particular | particular |
| 85 | regularidad | regularity | regular | regular |
| 86 | racionalidad | rationality | racional | rational |
| 87 | naturalidad | naturalness | natural | natural |
| 88 | universalidad | universality | universal | universal |
| 89 | temporalidad | temporality; temporary nature | temporal | temporal; temporary |
| 90 | materialidad | materiality | material | material |
| 91 | superficialidad | superficiality | superficial | superficial |
| 92 | potencialidad | potentiality; potential | potencial | potential |
| 93 | profesionalidad | professionalism | profesional | professional |
| 94 | especialidad | specialty; specialization | especial | special |
| 95 | generalidad | generality | general | general |
| 96 | cordialidad | cordiality; warmth | cordial | cordial; warm |
| 97 | genialidad | brilliance; stroke of genius | genial | brilliant; ingenious |
| 98 | banalidad | banality; triviality | banal | banal; trivial |
| 99 | brutalidad | brutality; brutal act | brutal | brutal |
| 100 | fatalidad | fatality; misfortune | fatal | fatal |
| 101 | moralidad | morality | moral | moral |
| 102 | puntualidad | punctuality | puntual | punctual |
| 103 | pluralidad | plurality | plural | plural |
| 104 | rivalidad | rivalry | rival | rival; competing |
| 105 | localidad | locality; town | local | local |
| 106 | mensualidad | monthly period/payment | mensual | monthly |
| 107 | natalidad | birth rate; natality | natal | natal; relating to birth |
| 108 | sensualidad | sensuality | sensual | sensual |
| 109 | sexualidad | sexuality | sexual | sexual |
| 110 | tenacidad | tenacity | tenaz | tenacious |
| 111 | veracidad | truthfulness; veracity | veraz | truthful |
| 112 | sagacidad | sagacity; shrewdness | sagaz | shrewd; perceptive |
| 113 | voracidad | voracity | voraz | voracious |
| 114 | ferocidad | ferocity | feroz | fierce; ferocious |
| 115 | fugacidad | fleetingness; transience | fugaz | fleeting; short-lived |
| 116 | atrocidad | atrocity; atrocious act | atroz | atrocious; terrible |
| 117 | locuacidad | talkativeness; loquacity | locuaz | talkative |
| 118 | vivacidad | liveliness; vivacity | vivaz | lively; vivacious |
| 119 | nulidad | nullity; invalidity | nulo | null; invalid |
| 120 | vanidad | vanity | vano | vain |
| 121 | ingenuidad | naïveté; ingenuousness | ingenuo | naïve; ingenuous |
| 122 | docilidad | docility | dócil | docile |
| 123 | ductilidad | ductility; flexibility | dúctil | ductile; flexible |
| 124 | sutilidad | subtlety | sutil | subtle |
| 125 | senilidad | senility | senil | senile |
| 126 | sociabilidad | sociability | sociable | sociable |
| 127 | solubilidad | solubility | soluble | soluble |
| 128 | adaptabilidad | adaptability | adaptable | adaptable |
| 129 | aceptabilidad | acceptability | aceptable | acceptable |
| 130 | habitabilidad | habitability | habitable | habitable |
| 131 | plausibilidad | plausibility | plausible | plausible |
| 132 | idoneidad | suitability; fitness | idóneo | suitable; appropriate |
| 133 | simultaneidad | simultaneity | simultáneo | simultaneous |
| 134 | espontaneidad | spontaneity | espontáneo | spontaneous |
| 135 | homogeneidad | homogeneity | homogéneo | homogeneous |
| 136 | heterogeneidad | heterogeneity | heterogéneo | heterogeneous |
| 137 | unanimidad | unanimity | unánime | unanimous |
| 138 | magnanimidad | magnanimity | magnánimo | magnanimous |
| 139 | corporeidad | corporeality; physical embodiment | corpóreo | corporeal |
| 140 | europeidad | European character/identity | europeo | European |
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