ready-made vs prefab

ready-made and prefab both are nouns.

Word	Noun	Adjective	Verb	Adverb
ready-made	Yes	Yes	No	No
prefab	Yes	Yes	No	No

ready-made (noun)	prefab (noun)
a manufactured artifact (as a garment or piece of furniture) that is made in advance and available for purchase	a prefabricated structure

ready-made (adjective)	prefab (adjective)
made for purchase and immediate use	manufactured in standard sizes to be shipped and assembled elsewhere
commercially produced; not homemade
repeated regularly without thought or originality