polyhidrosis vs hidrosis

polyhidrosis and hidrosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
polyhidrosis	Yes	No	No	No
hidrosis	Yes	No	No	No

As nouns, hidrosis is a hypernym of polyhidrosis; that is, hidrosis is a word with a broader meaning than polyhidrosis:

polyhidrosis: excessive and profuse perspiration
hidrosis: the process of the sweat glands of the skin secreting a salty fluid

Other hypernyms of polyhidrosis include diaphoresis, perspiration, sudation, sweating.

polyhidrosis (noun)	hidrosis (noun)
excessive and profuse perspiration	the process of the sweat glands of the skin secreting a salty fluid