hair drier vs blow drier

hair drier and blow drier both are nouns.

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

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

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

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

hair drier (noun)	blow drier (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