request vs communicate

request is a noun but communicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
request	Yes	No	Yes	No
communicate	No	No	Yes	No

As verbs, communicate is a hypernym of request; that is, communicate is a word with a broader meaning than request:

Other hypernyms of request include pass, pass along, pass on, put across.

request (noun)	communicate (noun)
the verbal act of requesting
a formal message requesting something that is submitted to an authority

request (verb)	communicate (verb)
express the need or desire for	transmit thoughts or feelings
ask (a person) to do something	transmit information
inquire for (information)	be in verbal contact; interchange information or ideas
	receive Communion, in the Catholic church
	administer Communion; in church
	join or connect
	transfer to another