chrestomathy vs excerpt

chrestomathy and excerpt both are nouns.

Word	Noun	Adjective	Verb	Adverb
chrestomathy	Yes	No	No	No
excerpt	Yes	No	Yes	No

As nouns, excerpt is a hypernym of chrestomathy; that is, excerpt is a word with a broader meaning than chrestomathy:

chrestomathy: a selection of passages from different authors that is compiled as an aid in learning a language
excerpt: a passage selected from a larger work

Other hypernyms of chrestomathy include excerption, extract, selection.

chrestomathy (noun)	excerpt (noun)
a selection of passages from different authors that is compiled as an aid in learning a language	a passage selected from a larger work

chrestomathy (verb)	excerpt (verb)
	take out of a literary work in order to cite or copy