The letters in DISCOVERY make 281 words of two letters or more. The longest is DISCOVERY at 9 letters, and the highest-scoring is DISCOVERY at 18 points.
No other single word uses all 9 letters of DISCOVERY. DISCOVERY has 9 letters: 3 vowels and 6 consonants, worth 18 points before any board bonuses.
9-letter words 1
8-letter words 4
7-letter words 9
codrive13devisor11devoirs11divorce13scrived13viceroy15visored11voicers12voiders11
6-letter words 29
5-letter words 78
cedis8ceros7cider8cires7coder8codes8coeds8coirs7cords8cored8cores7corse7cosey10cosie7coved11cover10coves10covey13coyed11coyer10credo8cried8cries7cyder11decor8decos8decoy11decry11dicer8dices8dicey11disco8diver9dives9doers6doser6doves9dries6drive9drove9dyers9eidos6ivory11osier5overs8oyers8redos6resid6resod6riced8rices7rides6rived9rives8rosed6roved9roves8score7scrod8servo8sired6siver8sodic8vedic11verso8viced11vices10video9viers8vireo8vires8vised9visor8voces10voice10voids9yirds9yores8
4-letter words 87
cedi7cero6cire6code7cods7coed7coir6cord7core6cory9cosy9cove9coys9cred7cris6deco7derv8devs8deys8dice7dies5dire5disc7dive8docs7doer5does5dore5dors5dory8dose5dove8drys8dyer8dyes8eros4iced7ices6ides5ired5ires4odes5odic7orcs6ores4over7oyer7oyes7recs6redo5reds5reis4revs7rice6ride5rids5rise4rive7rocs6rode5rods5roes4rose4rosy7rove7ryes7scry9sice6side5sire4sord5sore4sori4syce9very10vice9vide8vied8vier7vies7vire7vise7voes7void8yird8yods8yore7
3-letter words 53
cis5cod6cor5cos5coy8cry8dev7dey7die4dis4doc6doe4dor4dos4dry7dye7ers3ice5icy8ids4ire3ivy9ode4ods4oes3orc5ore3ors3ose3rec5red4rei3res3rev6rid4roc5rod4roe3rye6sec5sei3ser3sic5sir3sod4soy6sri3vie6vis6voe6yer6yes6yod7
2-letter words 20
cs4de3do3ed3er2es2id3is2od3oe2oi2or2os2oy5re2rs2si2so2ye5yo5
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.