academy vs yeshiva

academy and yeshiva both are nouns.

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

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

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

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