coatroom vs cloakroom

coatroom and cloakroom both are nouns.

Word	Noun	Adjective	Verb	Adverb
coatroom	Yes	No	No	No
cloakroom	Yes	No	No	No

As nouns, coatroom and cloakroom are synonyms defined as:

coatroom and cloakroom: a room where coats and other articles can be left temporarily

coatroom (noun)	cloakroom (noun)
a room where coats and other articles can be left temporarily	a room where coats and other articles can be left temporarily
	a private lounge off of a legislative chamber