tailcoat vs full dress

tailcoat and full dress both are nouns.

Word	Noun	Adjective	Verb	Adverb
tailcoat	Yes	No	No	No
full dress	Yes	No	No	No

As nouns, tailcoat and full dress are synonyms defined as:

tailcoat and full dress: formalwear consisting of full evening dress for men

Other synonyms of tailcoat include dress suit, tail coat, tails, white tie, white tie and tails.

tailcoat (noun)	full dress (noun)
formalwear consisting of full evening dress for men	formalwear consisting of full evening dress for men