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🔹 Deadjectival Nouns Ending in -idad

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The 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 NounNoun in EnglishBase AdjectiveBase Adjective in English
1realidadrealityrealreal
2posibilidadpossibilityposiblepossible
3seguridadsafety; security; certaintysegurosafe; secure; certain
4capacidadcapacity; abilitycapazcapable
5responsabilidadresponsibilityresponsableresponsible
6actividadactivityactivoactive
7felicidadhappinessfelizhappy
8facilidadease; facilityfácileasy
9casualidadchance; coincidencecasualaccidental; casual
10nacionalidadnationalitynacionalnational
11personalidadpersonalitypersonalpersonal
12actualidadpresent time; current affairsactualcurrent
13normalidadnormalitynormalnormal
14estabilidadstabilityestablestable
15disponibilidadavailabilitydisponibleavailable
16modalidadmodality; form; typemodalmodal
17mentalidadmentality; mindsetmentalmental
18utilidadusefulness; utilityútiluseful
19creatividadcreativitycreativocreative
20productividadproductivityproductivoproductive
21sensibilidadsensitivitysensiblesensitive
22popularidadpopularitypopularpopular
23sinceridadsinceritysincerosincere
24claridadclarityclaroclear
25profundidaddepth; profundityprofundodeep; profound
26velocidadspeed; velocityvelozfast; swift
27curiosidadcuriositycuriosocurious
28continuidadcontinuitycontinuocontinuous
29diversidaddiversitydiversodiverse
30flexibilidadflexibilityflexibleflexible
31legalidadlegalitylegallegal
32identidadidentityidénticoidentical
33privacidadprivacyprivadoprivate
34solidaridadsolidaritysolidariosupportive; solidary
35tranquilidadtranquility; calmtranquilocalm; peaceful
36dignidaddignitydignoworthy; dignified
37generosidadgenerositygenerosogenerous
38familiaridadfamiliarityfamiliarfamiliar
39originalidadoriginalityoriginaloriginal
40totalidadtotality; entiretytotaltotal
41vitalidadvitalityvitalvital; lively
42mortalidadmortalitymortalmortal
43finalidadpurpose; aimfinalfinal
44formalidadformality; seriousnessformalformal
45probabilidadprobabilityprobableprobable; likely
46visibilidadvisibilityvisiblevisible
47rentabilidadprofitabilityrentableprofitable
48compatibilidadcompatibilitycompatiblecompatible
49viabilidadviability; feasibilityviableviable; feasible
50accesibilidadaccessibilityaccesibleaccessible
51credibilidadcredibilitycreíblecredible; believable
52amabilidadkindness; friendlinessamablekind; friendly
53culpabilidadguilt; culpabilityculpableguilty; culpable
54habilidadability; skillhábilskillful; capable
55debilidadweaknessdébilweak
56fragilidadfragilityfrágilfragile
57agilidadagilityágilagile
58fertilidadfertilityfértilfertile
59imbecilidadstupidity; foolishnessimbécilfoolish; stupid
60intensidadintensityintensointense
61densidaddensitydensodense
62caducidadexpiration; expirycaducoexpired; obsolete
63fecundidadfecundity; productivenessfecundofertile; productive
64salubridadhealthfulness; salubritysalubrehealthful
65autenticidadauthenticityauténticoauthentic
66especificidadspecificityespecíficospecific
67elasticidadelasticityelásticoelastic
68toxicidadtoxicitytóxicotoxic
69luminosidadluminosity; brightnessluminosoluminous; bright
70peligrosidaddangerousness; hazard levelpeligrosodangerous
71religiosidadreligiosity; religious devotionreligiosoreligious
72objetividadobjectivityobjetivoobjective
73subjetividadsubjectivitysubjetivosubjective
74relatividadrelativityrelativorelative
75competitividadcompetitivenesscompetitivocompetitive
76efectividadeffectivenessefectivoeffective
77agresividadaggressivenessagresivoaggressive
78emotividademotionalityemotivoemotional
79exclusividadexclusivityexclusivoexclusive
80pasividadpassivitypasivopassive
81negatividadnegativitynegativonegative
82selectividadselectivityselectivoselective
83singularidadsingularity; uniquenesssingularsingular; unique
84particularidadparticularity; distinctive featureparticularparticular
85regularidadregularityregularregular
86racionalidadrationalityracionalrational
87naturalidadnaturalnessnaturalnatural
88universalidaduniversalityuniversaluniversal
89temporalidadtemporality; temporary naturetemporaltemporal; temporary
90materialidadmaterialitymaterialmaterial
91superficialidadsuperficialitysuperficialsuperficial
92potencialidadpotentiality; potentialpotencialpotential
93profesionalidadprofessionalismprofesionalprofessional
94especialidadspecialty; specializationespecialspecial
95generalidadgeneralitygeneralgeneral
96cordialidadcordiality; warmthcordialcordial; warm
97genialidadbrilliance; stroke of geniusgenialbrilliant; ingenious
98banalidadbanality; trivialitybanalbanal; trivial
99brutalidadbrutality; brutal actbrutalbrutal
100fatalidadfatality; misfortunefatalfatal
101moralidadmoralitymoralmoral
102puntualidadpunctualitypuntualpunctual
103pluralidadpluralitypluralplural
104rivalidadrivalryrivalrival; competing
105localidadlocality; townlocallocal
106mensualidadmonthly period/paymentmensualmonthly
107natalidadbirth rate; natalitynatalnatal; relating to birth
108sensualidadsensualitysensualsensual
109sexualidadsexualitysexualsexual
110tenacidadtenacitytenaztenacious
111veracidadtruthfulness; veracityveraztruthful
112sagacidadsagacity; shrewdnesssagazshrewd; perceptive
113voracidadvoracityvorazvoracious
114ferocidadferocityferozfierce; ferocious
115fugacidadfleetingness; transiencefugazfleeting; short-lived
116atrocidadatrocity; atrocious actatrozatrocious; terrible
117locuacidadtalkativeness; loquacitylocuaztalkative
118vivacidadliveliness; vivacityvivazlively; vivacious
119nulidadnullity; invaliditynulonull; invalid
120vanidadvanityvanovain
121ingenuidadnaïveté; ingenuousnessingenuonaïve; ingenuous
122docilidaddocilitydócildocile
123ductilidadductility; flexibilitydúctilductile; flexible
124sutilidadsubtletysutilsubtle
125senilidadsenilitysenilsenile
126sociabilidadsociabilitysociablesociable
127solubilidadsolubilitysolublesoluble
128adaptabilidadadaptabilityadaptableadaptable
129aceptabilidadacceptabilityaceptableacceptable
130habitabilidadhabitabilityhabitablehabitable
131plausibilidadplausibilityplausibleplausible
132idoneidadsuitability; fitnessidóneosuitable; appropriate
133simultaneidadsimultaneitysimultáneosimultaneous
134espontaneidadspontaneityespontáneospontaneous
135homogeneidadhomogeneityhomogéneohomogeneous
136heterogeneidadheterogeneityheterogéneoheterogeneous
137unanimidadunanimityunánimeunanimous
138magnanimidadmagnanimitymagnánimomagnanimous
139corporeidadcorporeality; physical embodimentcorpóreocorporeal
140europeidadEuropean character/identityeuropeoEuropean
Important morphophonological details:
  • Con adjetivos en -z, la z pasa a c: capaz → capacidad, feliz → felicidad, feroz → ferocidad, tenaz → tenacidad, veraz → veracidad.
  • Con adjetivos en -ble, la forma es siempre -bilidad, nunca *-blidad: posible → posibilidad, responsable → responsabilidad, visible → visibilidad, compatible → compatibilidad.
  • creíble → credibilidad: is irregular (not *creibilidad).
  • idéntico → identidad: involves a reduced base (not *identicidad).
  • privado → privacidad: shows the d → c alternation.
  • imbécil → imbecilidad: is regular; the written accent disappears because stress shifts to the final syllable.
  • vano → vanidad: belongs to a small group of -no adjectives that also take -idad (along with digno → dignidad, sano → sanidad).
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