agreement vs speech act

agreement and speech act both are nouns.

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

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

agreement (noun)	speech act (noun)
compatibility of observations	the use of language to perform some act
the thing arranged or agreed to
the verbal act of agreeing
the statement (oral or written) of an exchange of promises
the determination of grammatical inflection on the basis of word relations
harmony of people's opinions or actions or characters