coach-and-four vs equipage

coach-and-four and equipage both are nouns.

Word	Noun	Adjective	Verb	Adverb
coach-and-four	Yes	No	No	No
equipage	Yes	No	No	No

As nouns, equipage is a hypernym of coach-and-four; that is, equipage is a word with a broader meaning than coach-and-four:

Other hypernyms of coach-and-four include carriage, rig.

coach-and-four (noun)	equipage (noun)
a carriage pulled by four horses with one driver	a vehicle with wheels drawn by one or more horses
	equipment and supplies of a military force