The letters in MILLION make 37 words of two letters or more. The longest is MILLION at 7 letters, and the highest-scoring is MILLION at 9 points.
No other single word uses all 7 letters of MILLION. MILLION has 7 letters: 3 vowels and 4 consonants, worth 9 points before any board bonuses.
7-letter words 1
5-letter words 1
imino7
4-letter words 13
lilo4limn6limo6lino4lion4loin4mill6milo6mini6moil6moll6nill4noil4
3-letter words 11
ill3ion3lin3mil5moi5mol5mon5nil3nim5nom5oil3
2-letter words 11
in2li2lm4ln2lo2mi4mo4no2oi2om4on2
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.