Unscrambling EXPANSION gives 239 words. EXPANSION is the longest, and EXPANSION scores the most at 18 points.
No other single word uses all 9 letters of EXPANSION. EXPANSION has 9 letters: 4 vowels and 5 consonants, worth 18 points before any board bonuses.
9-letter words 1
8-letter words 1
saponine10
7-letter words 5
epinaos9pension9pinones9saponin9senopia9
6-letter words 22
anions6axions13axones13eonian6inanes6insane6inspan8nasion6opines8paeons8pannes8pennia8pennis8pianos8pinnae8pinnas8pinons8ponies8sannop8sienna6xenias13xenons13
5-letter words 58
aeons5anion5anise5annex12anons5aspen7axion12axone12axons12eosin5exons12expos14inane5napes7neaps7neons5nines5nipas7nixes12noise5nonas5nones5opens7opine7opsin7paeon7pains7paise7panes7panne7paseo7paxes14peans7peins7penna7penni7peons7piano7pians7pinas7pines7pinna7pinon7pions7pixes14poise7pones7poxes14psoae7psoai7senna5sepia7sneap7snipe7spean7spine7xenia12xenon12
4-letter words 72
aeon4ains4anes4anis4anon4apes6apex13apse6axes11axis11axon11eons4epos6exon11expo13inns4ions4nans4naoi4naos4nape6naps6neap6neon4nine4nipa6nips6nixe11noes4nona4none4nope6nose4ones4open6opes6oxen11oxes11pain6pane6pans6pase6pean6peas6pein6pens6peon6peso6pian6pias6pies6pina6pine6pins6pion6piso6pois6pone6pons6pose6psia6sain4sane4sine4sipe6snap6snip6soap6sone4spae6span6spin6
3-letter words 54
ain3ais3ane3ani3ape5asp5axe10ens3eon3inn3ins3ion3nae3nan3nap5nip5nix10non3nos3oes3one3ons3ope5ops5ose3pan5pas5pax12pea5pen5pes5pia5pie5pin5pis5pix12poe5poi5pox12psi5sae3sap5sax10sea3sei3sen3sin3sip5six10son3sop5sox10spa5xis10
2-letter words 26
ae2ai2an2as2ax9en2es2ex9in2is2na2ne2no2oe2oi2on2op4os2ox9pa4pe4pi4ps4si2so2xi9
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.