curler vs hair curler

curler and hair curler both are nouns.

Word	Noun	Adjective	Verb	Adverb
curler	Yes	No	No	No
hair curler	Yes	No	No	No

As nouns, curler and hair curler are synonyms defined as:

curler and hair curler: a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it

Other synonyms of curler include crimper, roller.

curler (noun)	hair curler (noun)
a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it	a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it