The letters in OBSERVING make 363 words of two letters or more. The longest is OBSERVING at 9 letters, and the highest-scoring is OBSERVING at 15 points.
No other single word uses all 9 letters of OBSERVING. OBSERVING has 9 letters: 3 vowels and 6 consonants, worth 15 points before any board bonuses.
9-letter words 1
8-letter words 1
sobering11
7-letter words 17
6-letter words 54
begins9beings9bevors11binger9binges9bingos9biogen9bogies9boners8bonier8boring9bovine11brines8brings9envois9eringo7genros7gibers9gibson9girons7givens10givers10gobies9goners7govern10grison7groins7groves10ignore7irones6nosier6ogives10orbing9orgies7ovines9region7reigns7renigs7renvoi9resign7ribose8robing9robins8rosing7roving10senior6sering7signer7signor7singer7soigne7soring7vigors10vireos9
5-letter words 94
begin8being8bergs8bevor10biers7bines7binge8bingo8birse7bison7bogie8boing8bones7bongs8bores7borne7brens7bries7brigs8brine7bring8brins7brios7brose7ebons7envoi8eosin5genro6giber8gibes8girns6giron6giros6given9giver9gives9goers6goner6gores6gorse6grins6groin6grove9irone5irons5negro6noirs5noise5noris5ogive9ogres6ornis5osier5ovens8overs8ovine8reign6reins5renig6resin5ribes7rings6rinse5risen5riven8rives8robes7robin7rosin5roven8roves8segni6segno6sengi6senor5serin5servo8singe6siren5siver8snore5sober7veins8verbs10verso8vibes10viers8vigor9vines8vinos8vireo8vires8visor8vogie9
4-letter words 109
begs7bens6berg7bier6bigs7bine6bins6bios6bise6bogs7bone6bong7bore6borg7born6brei6bren6brie6brig7brin6brio6bris6bros6ebon6egis5egos5engs5eons4ergo5ergs5erns4eros4gens5gibe7gibs7gien5gies5gins5girn5giro5give8gobs7goer5goes5gone5gore5grin5inro4ions4ires4iron4nebs6nevi7nibs6nobs6noes4nogs5noir4nori4nose4obes6obis6ogre5ones4orbs6ores4oven7over7rebs6regs5rein4reis4revs7ribs6rigs5ring5rins4rise4rive7robe6robs6roes4rose4rove7sego5sign5sine4sing5sire4snib6snob6snog5sone4song5sorb6sore4sori4sorn4vein7verb9vibe9vier7vies7vigs8vine7vino7vire7vise7voes7
3-letter words 66
beg6ben5big6bin5bio5bis5bog6bos5bro5ego4eng4ens3eon3erg4ern3ers3gen4gib6gie4gin4gob6gor4gre4ins3ion3ire3neb5nib5nob5nog4nor3nos3obe5obi5oes3one3ons3orb5ore3ors3ose3reb5reg4rei3res3rev6rib5rig4rin3rob5roe3seg4sei3sen3ser3sib5sin3sir3sob5son3sri3veg7vie6vig7vis6voe6
2-letter words 21
be4bi4bo4en2er2es2go3gs3in2is2ne2no2oe2oi2on2or2os2re2rs2si2so2
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.