yeshiva vs academy

yeshiva and academy both are nouns.

Word	Noun	Adjective	Verb	Adverb
yeshiva	Yes	No	No	No
academy	Yes	No	No	No

As nouns, academy is a hypernym of yeshiva; that is, academy is a word with a broader meaning than yeshiva:

yeshiva: an academy for the advanced study of Jewish texts (primarily the Talmud)
academy: a school for special training

yeshiva (noun)	academy (noun)
an academy for the advanced study of Jewish texts (primarily the Talmud)	a learned establishment for the advancement of knowledge
	a secondary school (usually private)
	a school for special training
	an institution for the advancement of art or science or literature