🔹 Denominal Nouns Ending in -ismo

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The suffix -ismo can form masculine nouns from common nouns and proper names. It commonly denotes doctrines, movements, systems, attitudes, practices, schools of thought, or adherence to a person and their ideas.

Proper names are especially productive: Platón → platonismo, Marx → marxismo, Darwin → darwinismo. The RAE notes that these bases are very often anthroponyms (the names of philosophers, scientists, political leaders, founders, etc.).

Ordered approximately by contemporary frequency and usefulness:

#	Spanish Noun	Noun in English	Base Noun	Base Noun in English
1	capitalismo	capitalism	capital	capital
2	racismo	racism	raza	race
3	egoísmo	selfishness; egoism	ego	ego
4	protagonismo	prominence; leading role	protagonista	protagonist
5	sexismo	sexism	sexo	sex
6	consumismo	consumerism	consumo	consumption
7	heroísmo	heroism	héroe	hero
8	compañerismo	camaraderie; fellowship	compañero	companion; colleague
9	clasismo	classism	clase	class
10	partidismo	partisanship	partido	party; faction
11	victimismo	victim mentality	víctima	victim
12	derrotismo	defeatism	derrota	defeat
13	revanchismo	revanchism; desire for revenge	revancha	revenge; rematch
14	caudillismo	strongman politics; caudillismo	caudillo	political leader; strongman
15	creacionismo	creationism	creación	creation
16	amiguismo	cronyism; favoritism	amigo	friend
17	golpismo	support for coups	golpe	blow; coup
18	senderismo	hiking	sendero	trail; path
19	vanguardismo	avant-gardism	vanguardia	avant-garde
20	marxismo	Marxism	Marx	Marx
21	darwinismo	Darwinism	Darwin	Darwin
22	budismo	Buddhism	Buda	Buddha
23	platonismo	Platonism	Platón	Plato
24	peronismo	Peronism	Perón	Perón
25	franquismo	Francoism	Franco	Franco
26	chavismo	Chavismo	Chávez	Chávez
27	leninismo	Leninism	Lenin	Lenin
28	estalinismo	Stalinism	Stalin	Stalin
29	maoísmo	Maoism	Mao	Mao
30	trotskismo	Trotskyism	Trotski	Trotsky
31	castrismo	Castroism	Castro	Castro
32	kirchnerismo	Kirchnerism	Kirchner	Kirchner
33	bolivarismo	Bolivarianism	Bolívar	Bolívar
34	zapatismo	Zapatismo	Zapata	Zapata
35	estatismo	statism	Estado	state
36	cubismo	Cubism	cubo	cube
37	daltonismo	color blindness	Dalton	Dalton
38	quijotismo	quixotism; impractical idealism	Quijote	Don Quixote
39	vampirismo	vampirism	vampiro	vampire
40	enchufismo	cronyism; favoritism	enchufe	connection; influence
41	asambleísmo	assembly-based politics	asamblea	assembly
42	zarismo	tsarism	zar	tsar
43	kantismo	Kantianism	Kant	Kant
44	aristotelismo	Aristotelianism	Aristóteles	Aristotle
45	tomismo	Thomism	Tomás de Aquino	Thomas Aquinas
46	averroísmo	Averroism	Averroes	Averroes
47	maquiavelismo	Machiavellianism	Maquiavelo	Machiavelli
48	freudismo	Freudianism	Freud	Freud
49	taylorismo	Taylorism	Taylor	Taylor
50	fordismo	Fordism	Ford	Ford
51	mesmerismo	mesmerism	Mesmer	Mesmer
52	cervantismo	study or admiration of Cervantes	Cervantes	Cervantes
53	carlismo	Carlism	Carlos	Carlos; Charles
54	alfonsismo	support for an Alfonso; Alfonsism	Alfonso	Alfonso
55	bonapartismo	Bonapartism	Bonaparte	Bonaparte
56	gaullismo	Gaullism	de Gaulle	de Gaulle
57	malinchismo	preference for foreign things over one's own	Malinche	La Malinche
58	madridismo	support for Real Madrid	Real Madrid	Real Madrid
59	boquismo	support for Boca Juniors	Boca Juniors	Boca Juniors
60	riverismo	support for River Plate	River Plate	River Plate

Useful morphological details

The final vowel of the base is generally lost (revancha → revanchismo), but there are special adjustments with proper names: Carlos → carlismo, Cervantes → cervantismo, Chávez → chavismo, Averroes → averroísmo, while Mao → maoísmo preserves the vowel. The RAE discusses these explicitly.

Note for classification:

Keep clearly adjectival formations such as social → socialismo, liberal → liberalismo, real → realismo in a separate A-ismo category.

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