blow drier vs drier

blow drier and drier both are nouns.

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

As nouns, drier is a hypernym of blow drier; that is, drier is a word with a broader meaning than blow drier:

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

Other hypernyms of blow drier include blower, dryer.

blow drier (noun)	drier (noun)
a hand-held electric blower that can blow warm air onto the hair; used for styling hair	an appliance that removes moisture
	a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture)