fundamentalist vs disciple

fundamentalist and disciple both are nouns.

Word	Noun	Adjective	Verb	Adverb
fundamentalist	Yes	Yes	No	No
disciple	Yes	No	No	No

As nouns, disciple is a hypernym of fundamentalist; that is, disciple is a word with a broader meaning than fundamentalist:

Other hypernyms of fundamentalist include adherent.

fundamentalist (noun)	disciple (noun)
a supporter of fundamentalism	someone who believes and helps to spread the doctrine of another
an adherent of fundamentalist principles

fundamentalist (adjective)	disciple (adjective)
of or relating to or characteristic of Protestant fundamentalism or its adherents
of or relating to or tending toward ideological fundamentalism