request vs speech act

request and speech act both are nouns.

Word	Noun	Adjective	Verb	Adverb
request	Yes	No	Yes	No
speech act	Yes	No	No	No

As nouns, speech act is a hypernym of request; that is, speech act is a word with a broader meaning than request:

request (noun)	speech act (noun)
the verbal act of requesting	the use of language to perform some act
a formal message requesting something that is submitted to an authority

request (verb)	speech act (verb)
express the need or desire for
ask (a person) to do something
inquire for (information)