The letters in RETURNING make 144 words of two letters or more. The longest is RETURNING at 9 letters, and the highest-scoring is RETURNING at 10 points.
No other single word uses all 9 letters of RETURNING. RETURNING has 9 letters: 3 vowels and 6 consonants, worth 10 points before any board bonuses.
9-letter words 1
8-letter words 3
retuning9tenuring9unerring9
7-letter words 9
6-letter words 22
engirt7erring7ginner7gunite7gunner7gunter7gurnet7intern6inturn6return6ringer7ruiner6runner6tinner6triune6truing7tuning7turner6ungirt7uniter6unrent6urgent7
5-letter words 27
ennui5grunt6inert5inner5inter5inure5inurn5niter5nitre5reign6renig6renin5rerig6rerun5ruing6rutin5tiger6tinge6trier5trine5truer5tuner5unite5unrig6untie5urger6uteri5
4-letter words 34
etui4gent5genu5gien5girn5girt5gite5grin5grit5grue5nine4nite4rein4rent4ring5rite4ruer4ruin4rune4rung5runt4tern4tier4tine4ting5tire4trig5true4trug5tune4tung5turn4unit4urge5
3-letter words 37
eng4erg4ern3err3ert3gen4get4gie4gin4git4gnu4gre4gut4inn3ire3net3nit3nun3nut3reg4rei3ret3rig4rin3rue3rug4run3rut3teg4ten3tie3tin3tug4tui3tun3uni3urn3
2-letter words 11
en2er2et2in2it2ne2nu2re2ti2un2ut2
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.