Unscrambling TRACKS gives 62 words. TRACKS is the longest, and TRACKS scores the most at 12 points.
No other single word uses all 6 letters of TRACKS. TRACKS has 6 letters: 1 vowel and 5 consonants, worth 12 points before any board bonuses.
6-letter words 1
5-letter words 10
carks11carts7karst9karts9racks11scart7stack11stark9tacks11track11
4-letter words 24
acts6arcs6arks8arts4cark10cars6cart6cask10cast6cats6kart8kats8rack10rats4sack10sark8scar6scat6skat8star4tack10tars4task8tsar4
3-letter words 18
act5arc5ark7ars3art3ask7car5cat5kas7kat7ras3rat3sac5sat3ska7tar3tas3tsk7
2-letter words 9
ar2as2at2cs4ka6ks6rs2ta2ts2
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.