The letters in SUITABLY make 165 words of two letters or more. The longest is SUITABLY at 8 letters, and the highest-scoring is SUITABLY at 13 points.
No other single word uses all 8 letters of SUITABLY. SUITABLY has 8 letters: 3 vowels and 5 consonants, worth 13 points before any board bonuses.
8-letter words 1
7-letter words 1
tabulis9
6-letter words 10
bialys11blasty11busily11butyls11situla6stably11suably11subtly11tabuli8usably11
5-letter words 27
abuts7alist5bails7baits7basil7bialy10bitsy10blast7blats7built7busty10butyl10laity8litas5lusty8salty8sault5sibyl10silty8slaty8styli8tabus7tails5talus5tsuba7tubal7tubas7
4-letter words 59
ably9abut6abys9ails4aits4albs6alit4alts4bail6bait6bals6bast6bats6bays9bias6bits6blat6bust6busy9buts6buys9isba6labs6last4lati4lats4lays7libs6list4lits4litu4lust4sail4salt4sati4saul4sial4silt4slab6slat4slay7slit4slub6stab6stay7stub6suba6suit4syli7tabs6tabu6tail4tali4taus4tils4tuba6tubs6tuis4utas4
3-letter words 46
abs5aby8ail3ais3ait3alb5als3alt3ays6bal5bas5bat5bay8bis5bit5bus5but5buy8bys8its3lab5las3lat3lay6lib5lis3lit3sab5sal3sat3sau3say6sib5sit3sly6sty6sub5tab5tas3tau3til3tis3tub5tui3uta3uts3
2-letter words 21
ab4ai2al2as2at2ay5ba4bi4by7is2it2la2li2ls2si2ta2ti2ts2us2ut2ya5
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.