cow vs moo-cow

cow and moo-cow both are nouns.

Word	Noun	Adjective	Verb	Adverb
cow	Yes	No	Yes	No
moo-cow	Yes	No	No	No

As nouns, cow and moo-cow are synonyms defined as:

cow (noun)	moo-cow (noun)
female of domestic cattle:	female of domestic cattle:
mature female of mammals of which the male is called `bull'
a large unpleasant woman

cow (verb)	moo-cow (verb)
subdue, restrain, or overcome by affecting with a feeling of awe; frighten (as with threats)