sports commentator vs sports announcer

sports commentator and sports announcer both are nouns.

Word	Noun	Adjective	Verb	Adverb
sports commentator	Yes	No	No	No
sports announcer	Yes	No	No	No

As nouns, sports commentator and sports announcer are synonyms defined as:

sports commentator and sports announcer: an announcer who reads sports news or describes sporting events

Other synonyms of sports commentator include sportscaster.

sports commentator (noun)	sports announcer (noun)
an announcer who reads sports news or describes sporting events	an announcer who reads sports news or describes sporting events