repeat vs tell

repeat is a noun but tell is not a noun.

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

As verbs, tell is a hypernym of repeat; that is, tell is a word with a broader meaning than repeat:

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

repeat (verb)	tell (verb)
happen or occur again	discern or comprehend
to say, state, or perform again	mark as different
to say again or imitate	let something be known
make or do or perform again	narrate or give a detailed account of
repeat an earlier theme of a composition	give instructions to or direct somebody to do something with authority
do over	give evidence
	express in words
	inform positively and with certainty and confidence