blow dryer vs hair dryer

blow dryer and hair dryer both are nouns.

Word	Noun	Adjective	Verb	Adverb
blow dryer	Yes	No	No	No
hair dryer	Yes	No	No	No

As nouns, blow dryer and hair dryer are synonyms defined as:

blow dryer and hair dryer: a hand-held electric blower that can blow warm air onto the hair; used for styling hair

Other synonyms of blow dryer include blow drier, hair drier, hand blower.

blow dryer (noun)	hair dryer (noun)
a hand-held electric blower that can blow warm air onto the hair; used for styling hair	a hand-held electric blower that can blow warm air onto the hair; used for styling hair