There are 30 words hidden in the letters of SYSTEM, from 9 two-letter words up to SYSTEM (6 letters). For points, SYSTEM is best at 11.
No other single word uses all 6 letters of SYSTEM. SYSTEM has 6 letters: 1 vowel and 5 consonants, worth 11 points before any board bonuses.
6-letter words 1
5-letter words 3
messy10stems7styes8
4-letter words 7
mess6sets4stem6stey7stye7tyes7yest7
3-letter words 10
ems5ess3mes5met5mys8set3sty6tye6yes6yet6
2-letter words 9
em4es2et2me4ms4my7ss2ts2ye5
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.