9-letter words starting with tre
- trepidant — trepid.
- treponema — any of several anaerobic spirochetes of the genus Treponema, certain species of which are parasitic in and pathogenic for humans and warm-blooded animals.
- tres-tine — royal antler.
- tretinoin — a drug chemically related to vitamin A, used as a topical ointment to treat skin disorders, especially acne.
- trevelyan — George Macaulay, 1876–1962, English historian.
- trez-tine — royal antler.