The letters in EXPANDING make 144 words of two letters or more. The longest is EXPANDING at 9 letters, and the highest-scoring is EXPANDING at 20 points.
No other single word uses all 9 letters of EXPANDING. EXPANDING has 9 letters: 3 vowels and 6 consonants, worth 20 points before any board bonuses.
9-letter words 1
7-letter words 2
deaning9pending11
6-letter words 14
5-letter words 19
annex12aping8axing13deign7dinge7gaped9genip8inane5index13inned6nixed13paged9paned8panne7penna7penni7pined8pinna7xenia12
4-letter words 43
aged6agin5aide5aped7apex13axed12dang6dean5dine5ding6egad6gadi6gaed6gaen5gain5gane5gape7gean5gied6gien5idea5nape6neap6nide5nine4nipa6nixe11padi7page7paid7pain6pane6pang7peag7pean6pein6pend7peng7pian6pied7pina6pine6ping7
3-letter words 47
age4aid4ain3and4ane3ani3ape5axe10dag5dap6den4dex11die4dig5din4dip6end4eng4gad5gae4gan4gap6ged5gen4gid5gie4gin4gip6inn3nae3nag4nan3nap5nip5nix10pad6pan5pax12pea5ped6peg6pen5pia5pie5pig6pin5pix12
2-letter words 18
ad3ae2ag3ai2an2ax9de3ed3en2ex9id3in2na2ne2pa4pe4pi4xi9
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.