5 letters · 7 points in Scrabble
noun a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
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)
originFrom New Latin stoma, from Ancient Greek στόμα (stóma, “mouth”).
Etymology from Wiktionary, CC BY-SA 3.0