camelhair vs camel's hair

camelhair and camel's hair both are nouns.

Word	Noun	Adjective	Verb	Adverb
camelhair	Yes	No	No	No
camel's hair	Yes	No	No	No

As nouns, camelhair and camel's hair are synonyms defined as:

camelhair and camel's hair: a soft tan cloth made with the hair of a camel

camelhair (noun)	camel's hair (noun)
a soft tan cloth made with the hair of a camel	a soft tan cloth made with the hair of a camel