pocket comb vs pocketcomb

pocket comb and pocketcomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
pocket comb	Yes	No	No	No
pocketcomb	Yes	No	No	No

As nouns, pocket comb and pocketcomb are synonyms defined as:

pocket comb and pocketcomb: a small comb suitable for carrying in a pocket

pocket comb (noun)	pocketcomb (noun)
a small comb suitable for carrying in a pocket	a small comb suitable for carrying in a pocket