water stoma vs stomate

water stoma and stomate both are nouns.

Word	Noun	Adjective	Verb	Adverb
water stoma	Yes	No	No	No
stomate	Yes	No	No	No

As nouns, stomate is a hypernym of water stoma; that is, stomate is a word with a broader meaning than water stoma:

water stoma: a pore that exudes water on the surface or margin of a leaf of higher plants
stomate: a minute epidermal pore in a leaf or stem through which gases and water vapor can pass

Other hypernyms of water stoma include pore, stoma.

water stoma (noun)	stomate (noun)
a pore that exudes water on the surface or margin of a leaf of higher plants	a minute epidermal pore in a leaf or stem through which gases and water vapor can pass