The letters in COMMONLY make 51 words of two letters or more. The longest is COMMONLY at 8 letters, and the highest-scoring is COMMONLY at 17 points.
No other single word uses all 8 letters of COMMONLY. COMMONLY has 8 letters: 2 vowels and 6 consonants, worth 17 points before any board bonuses.
8-letter words 1
6-letter words 2
colony11common12
5-letter words 6
colon7commy14cooly10cymol12loony8moony10
4-letter words 16
clon6cloy9coly9cony9cool6coom8loco6loom6loon4moly9mono6mony9mool6moon6nolo4only7
3-letter words 14
col5con5coo5coy8loo3moc7mol5mom7mon5moo5nom5noo3yom8yon6
2-letter words 12
lm4ln2lo2mm6mo4my7no2om4on2oo2oy5yo5
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.