15-letter words containing f, s, y, t
- venus's-flytrap — a carnivorous plant, Dionaea muscipula, native to bogs of North and South Carolina, having roundish leaves with two lobes that close like a trap when certain delicate hairs on them are irritated, as by a fly: the range is now reduced, though the plants are still locally abundant.
- walnut husk fly — any of several fruit flies, as Rhagoletis completa, the larvae of which feed on and discolor walnut husks.
- wolf-rayet star — a very hot (35,000–100,000 K) and luminous star in the early stages of evolution, with broad emission lines in its spectrum.
- yeast infection — candida: genital inflammation
- yellow goatfish — a schooling goatfish, Mulloidichthys martinicus, inhabiting the Atlantic Ocean from Florida to Panama.