remark vs tell

remark is a noun but tell is not a noun.

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

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

Other hypernyms of remark include say, state.

remark (noun)	tell (noun)
explicit notice
a statement that expresses a personal opinion or belief or adds information

remark (verb)	tell (verb)
make mention of	discern or comprehend
make or write a comment on	mark as different
	let something be known
	narrate or give a detailed account of
	give instructions to or direct somebody to do something with authority
	give evidence
	express in words
	inform positively and with certainty and confidence