meat loaf vs meatloaf

meat loaf and meatloaf both are nouns.

Word	Noun	Adjective	Verb	Adverb
meat loaf	Yes	No	No	No
meatloaf	Yes	No	No	No

As nouns, meat loaf and meatloaf are synonyms defined as:

meat loaf (noun)	meatloaf (noun)
a baked loaf of ground meat	a baked loaf of ground meat