redhead vs carrottop

redhead and carrottop both are nouns.

Word	Noun	Adjective	Verb	Adverb
redhead	Yes	No	No	No
carrottop	Yes	No	No	No

As nouns, redhead and carrottop are synonyms defined as:

Other synonyms of redhead include red-header, redheader.

redhead (noun)	carrottop (noun)
black-and-white North American woodpecker having a red head and neck	someone who has red hair
North American diving duck with a grey-and-black body and reddish-brown head
someone who has red hair