eveningwear vs formalwear

eveningwear and formalwear both are nouns.

Word	Noun	Adjective	Verb	Adverb
eveningwear	Yes	No	No	No
formalwear	Yes	No	No	No

As nouns, eveningwear and formalwear are synonyms defined as:

eveningwear and formalwear: attire to wear on formal occasions in the evening

Other synonyms of eveningwear include evening clothes, evening dress.

eveningwear (noun)	formalwear (noun)
attire to wear on formal occasions in the evening	attire to wear on formal occasions in the evening