The letters in HAPPINESS make 241 words of two letters or more. The longest is HAPPINESS at 9 letters, and the highest-scoring is HAPPINESS at 16 points.
No other single word uses all 9 letters of HAPPINESS. HAPPINESS has 9 letters: 3 vowels and 6 consonants, worth 16 points before any board bonuses.
9-letter words 1
8-letter words 3
pinesaps12shippens15snappish15
7-letter words 11
6-letter words 24
anises6aspens8aspish11hanses9happen13nappes10nappie10pashes11pepsin10phases11phasis11pishes11sanies6sansei6sepias8shapen11shapes11shines9shnaps11sneaps8snipes8spahis11speans8spines8
5-letter words 55
anise5aphis10apish10apses7apsis7ashen8ashes8aspen7aspis7ephas10hanse8hasps10heaps10napes7nappe9neaps7nipas7pains7paise7panes7pases7passe7peans7peins7phase10pians7pinas7pines7pipes9sains5sanes5sasin5sensa5sepia7shape10sheas8shies8shine8shins8ships10sines5sinhs8sipes7snaps7snash8sneap7snipe7snips7spaes7spahi10spans7spean7spies7spine7spins7
4-letter words 73
ains4anes4anis4apes6apps8apse6asps6epha9haen7haes7haps9hasp9heap9hens7hies7hins7hips9hisn7hiss7nape6naps6neap6ness4nipa6nips6pain6pane6pans6paps8pase6pash9pass6pean6peas6pehs9pein6pens6peps8phis9pian6pias6pies6pina6pine6pins6pipe8pips8pish9psia6psis6sain4sane4sans4saps6sash7seas4seis4sens4shea7shes7shin7ship9sine4sinh7sins4sipe6sips6snap6snip6spae6span6spas6spin6
3-letter words 52
ain3ais3ane3ani3ape5ash6asp5ens3ess3hae6hap8has6hen6hep8hes6hie6hin6hip8his6ins3nae3nah6nap5nip5pah8pan5pap7pas5pea5peh8pen5pep7pes5phi8pia5pie5pin5pip7pis5psi5sae3sap5sea3sei3sen3sha6she6sin3sip5sis3spa5ssh6
2-letter words 22
ae2ah5ai2an2as2eh5en2es2ha5he5hi5in2is2na2ne2pa4pe4pi4ps4sh5si2ss2
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.