sexism vs antifeminism

sexism and antifeminism both are nouns.

Word	Noun	Adjective	Verb	Adverb
sexism	Yes	No	No	No
antifeminism	Yes	No	No	No

As nouns, antifeminism is a hyponym of sexism; that is, antifeminism is a word with a more specific, narrower meaning than sexism:

sexism: discriminatory or abusive behavior towards members of the opposite sex
antifeminism: activity indicative of belief in the superiority of men over women

Other hyponyms of sexism include chauvinism, male chauvinism, sexual discrimination.

sexism (noun)	antifeminism (noun)
discriminatory or abusive behavior towards members of the opposite sex	activity indicative of belief in the superiority of men over women