stoma vs water pore

stoma and water pore both are nouns.

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

As nouns, water pore is a hyponym of stoma; that is, water pore is a word with a more specific, narrower meaning than stoma:

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

Other hyponyms of stoma include germ pore, hydathode, water stoma, lenticel.

stoma (noun)	water pore (noun)
a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)	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