Unscrambling VASTLY gives 42 words. VASTLY is the longest, and VASTLY scores the most at 12 points.
No other single word uses all 6 letters of VASTLY. VASTLY has 6 letters: 1 vowel and 5 consonants, worth 12 points before any board bonuses.
6-letter words 1
5-letter words 4
salty8slaty8sylva11vasty11
4-letter words 12
alts4last4lats4lavs7lays7salt4slat4slay7stay7tavs7vast7vats7
3-letter words 16
als3alt3ays6las3lat3lav6lay6sal3sat3say6sly6sty6tas3tav6vas6vat6
2-letter words 9
al2as2at2ay5la2ls2ta2ts2ya5
Words are from our open word list and include some game-only words. Rude words are left out of this page; the unscrambler shows every valid word, lets you add blank tiles and filter by length.