remark vs say

remark and say both are nouns.

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

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

Other hypernyms of remark include state, tell.

remark (noun)	say (noun)
explicit notice	the chance to speak
a statement that expresses a personal opinion or belief or adds information

remark (verb)	say (verb)
make mention of	express in words
make or write a comment on	report or maintain
	speak, pronounce, or utter in a certain way
	express a supposition
	give instructions to or direct somebody to do something with authority
	communicate or express nonverbally
	recite or repeat a fixed text
	indicate
	state as one's opinion or judgement; declare
	utter aloud
	have or contain a certain wording or form