say vs require

say is a noun but require is not a noun.

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

As verbs, require is a hyponym of say; that is, require is a word with a more specific, narrower meaning than say:

Other hyponyms of say include direct, instruct, command, call, send for, warn, prescribe.

say (noun)	require (noun)
the chance to speak

say (verb)	require (verb)
express in words	make someone do something
report or maintain	consider obligatory; request and expect
speak, pronounce, or utter in a certain way	have need of
express a supposition	require as useful, just, or proper
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