recap vs summarize

recap is a noun but summarize is not a noun.

Word	Noun	Adjective	Verb	Adverb
recap	Yes	No	Yes	No
summarize	No	No	Yes	No

As verbs, summarize is a hypernym of recap; that is, summarize is a word with a broader meaning than recap:

Other hypernyms of recap include resume, sum up, summarise.

recap (noun)	summarize (noun)
a summary at the end that repeats the substance of a longer discussion
a used automobile tire that has been remolded to give it new treads

recap (verb)	summarize (verb)
summarize briefly	give a summary (of)
	be a summary of