say vs send for

say is a noun but send for is not a noun.

Word	Noun	Adjective	Verb	Adverb
say	Yes	No	Yes	No
send for	No	No	Yes	No

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

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

say (noun)	send for (noun)
the chance to speak

say (verb)	send for (verb)
express in words	order, request, or command to come
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