The letters in ACHIEVING make 127 words of two letters or more. The longest is ACHIEVING at 9 letters, and the highest-scoring is ACHIEVING at 18 points.
No other single word uses all 9 letters of ACHIEVING. ACHIEVING has 9 letters: 4 vowels and 5 consonants, worth 18 points before any board bonuses.
9-letter words 1
8-letter words 1
vicinage14
7-letter words 2
heaving14inveigh14
6-letter words 13
5-letter words 25
acing8acini7cavie10chain10chang11china10chine10ching11chive13civie10ganev9genic8genii6given9hance10haven11hinge9icing8naevi8naive8neigh9niche10vegan9vinca10vinic10
4-letter words 38
ache9acne6agin5cage7cain6cane6cave9chia9chin9cine6each9gaen5gain5gane5gave8gean5gien5give8haen7hang8have10hive10inch9inia4nave7nevi7nice6nigh8vagi8vain7vane7vang8vein7vena7vice9viga8vina7vine7
3-letter words 34
ace5age4ain3ane3ani3ave6can5cha8chi8cig6eng4gae4gan4gen4ghi7gie4gin4hae6hag7hen6hic8hie6hin6ice5ich8nae3nag4nah6vac8van6veg7via6vie6vig7
2-letter words 13
ae2ag3ah5ai2an2eh5en2ha5he5hi5in2na2ne2
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.