The letters in ATTACHING make 119 words of two letters or more. The longest is ATTACHING at 9 letters, and the highest-scoring is ATTACHING at 15 points.
No other single word uses all 9 letters of ATTACHING. ATTACHING has 9 letters: 3 vowels and 6 consonants, worth 15 points before any board bonuses.
9-letter words 1
8-letter words 1
chatting14
7-letter words 5
acanthi12agnatic10catting10gnathic13hatting11
6-letter words 8
5-letter words 23
acing8actin7again6agita6aitch10antic7attic7chain10chang11chant10china10ching11giant6natch10night9tacit7taiga6taint5thing9tight9tinct7titan5titch10
4-letter words 33
acta6agha8agin5anga5anta4anti4cain6cant6chat9chia9chin9chit9gain5gait5ghat8gnat5hang8hant7hint7inch9itch9nigh8tach9tact6tain4tana4tang5tanh7than7that7thin7ting5tint4
3-letter words 35
aah6act5aga4aha6ain3ait3ana3ani3ant3att3can5cat5cha8chi8cig6gan4gat4ghi7gin4git4hag7hat6hic8hin6hit6ich8nag4nah6nit3nth6tag4tan3tat3tic5tin3
2-letter words 13
aa2ag3ah5ai2an2at2ha5hi5in2it2na2ta2ti2
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.