hair vs seta

hair and seta both are nouns.

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

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

Other hyponyms of hair include bristle, sensory hair, vibrissa, whisker, pilus.

hair (noun)	seta (noun)
a filamentous projection or process on an organism	a stiff hair or bristle
cloth woven from horsehair or camelhair; used for upholstery or stiffening in garments	stalk of a moss capsule
a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss
any of the cylindrical filaments characteristically growing from the epidermis of a mammal
filamentous hairlike growth on a plant
a very small distance or space