The letters in EXCLUDE make 43 words of two letters or more. The longest is EXCLUDE at 7 letters, and the highest-scoring is EXCLUDE at 17 points.
No other single word uses all 7 letters of EXCLUDE. EXCLUDE has 7 letters: 3 vowels and 4 consonants, worth 17 points before any board bonuses.
7-letter words 1
6-letter words 1
deluxe14
5-letter words 7
clued8culex14deuce8educe8elude6excel14exude13
4-letter words 11
cede7clue6cued7dele5duce7duel5exec13leud5luce6lude5luxe11
3-letter words 17
cee5cel5cud6cue5dee4del4dex11due4dux11ecu5eel3eld4led4lee3leu3lex10lux10
2-letter words 6
de3ed3el2ex9lx9xu9
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.