recur vs repeat

recur is not a noun while repeat is a noun.

Word	Noun	Adjective	Verb	Adverb
recur	No	No	Yes	No
repeat	Yes	No	Yes	No

As verbs, recur and repeat are synonyms defined as:

recur (noun)	repeat (noun)
	an event that repeats

recur (verb)	repeat (verb)
happen or occur again	happen or occur again
return in thought or speech to something	to say, state, or perform again
have recourse to	to say again or imitate
	make or do or perform again
	repeat an earlier theme of a composition
	do over