formal semantics vs semantics

formal semantics and semantics both are nouns.

Word	Noun	Adjective	Verb	Adverb
formal semantics	Yes	No	No	No
semantics	Yes	No	No	No

As nouns, semantics is a hypernym of formal semantics; that is, semantics is a word with a broader meaning than formal semantics:

formal semantics: the branch of semantics that studies the logical aspects of meaning
semantics: the study of language meaning

formal semantics (noun)	semantics (noun)
the branch of semantics that studies the logical aspects of meaning	the study of language meaning
	the meaning of a word, phrase, sentence, or text