dinner jacket vs tuxedo

dinner jacket and tuxedo both are nouns.

Word	Noun	Adjective	Verb	Adverb
dinner jacket	Yes	No	No	No
tuxedo	Yes	No	No	No

As nouns, dinner jacket and tuxedo are synonyms defined as:

Other synonyms of dinner jacket include black tie, tux.

dinner jacket (noun)	tuxedo (noun)
semiformal evening dress for men	semiformal evening dress for men