repeat vs recur

repeat is a noun but recur is not a noun.

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

As verbs, repeat and recur are synonyms defined as:

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

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