The letters in UNLIKELY make 68 words of two letters or more. The longest is UNLIKELY at 8 letters, and the highest-scoring is UNLIKELY at 15 points.
No other single word uses all 8 letters of UNLIKELY. UNLIKELY has 8 letters: 3 vowels and 5 consonants, worth 15 points before any board bonuses.
8-letter words 1
6-letter words 2
5-letter words 7
inkle9kelly12knell9liken9liney8linky12nelly8
4-letter words 26
illy7inky11inly7kiln8kine8kyle11leku8lien4lieu4like8lily7line4link8liny7lune4lunk8luny7neuk8nill4nuke8null4yelk11yell7yeuk11yill7yule7
3-letter words 22
elk7ell3ilk7ill3ink7ken7key10kin7kue7lei3lek7leu3ley6lie3lin3lye6nil3uke7uni3yen6yin6yuk10
2-letter words 10
el2en2in2ki6li2ln2ne2nu2un2ye5
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.