blower vs hand blower

blower and hand blower both are nouns.

Word	Noun	Adjective	Verb	Adverb
blower	Yes	No	No	No
hand blower	Yes	No	No	No

As nouns, hand blower is a hyponym of blower; that is, hand blower is a word with a more specific, narrower meaning than blower:

blower: a device that produces a current of air
hand blower: a hand-held electric blower that can blow warm air onto the hair; used for styling hair

Other hyponyms of blower include bellows, blow drier, blow dryer, hair drier, hair dryer, grain blower, suction blower.

blower (noun)	hand blower (noun)
large aquatic carnivorous mammal with fin-like forelimbs no hind limbs, including: whales, dolphins, porpoises, narwhals	a hand-held electric blower that can blow warm air onto the hair; used for styling hair
a device that produces a current of air
a fan run by an electric motor