use '?' for JOKER (blank)

From letters B, O, U, L, E, V, E, R, S, E, M, E, N, T, S  I made following words

15 letter words

bouleversements[22]

14 letter words

bouleversement[21]

11 letter words

venturesome[16]

10 letter words

revelments[15], oversubtle[15], volumeters[15], lobstermen[14], numberless[14], resolvents[13], volunteers[13], remoteness[12], bluestones[12], rousements[12]

9 letter words

revelment[14], overmelts[14], volumeter[14], ensembles[13], resembles[13], temblores[13], bluestems[13], stumblers[13], elevenses[12], nerveless[12], resolvent[12], eventless[12], overtness[12], ourselves[12], volunteer[12], trueloves[12], outserves[12], terebenes[11], telomeres[11], solemnest[11], steersmen[11], molesters[11], bluenoses[11], bluestone[11], muleteers[11], tenebrous[11], rousement[11], boletuses[11], tubenoses[11], muensters[11], tuberoses[11], burstones[11], entresols[9], resolutes[9], turnsoles[9]

8 letter words

bevelers[13], versemen[13], venomers[13], moveless[13], verbless[13], observes[13], obverses[13], overmelt[13], verboten[13], overbets[13], subvenes[13], subserve[13], subverts[13], ensemble[12], resemble[12], berseems[12], embosser[12], trembles[12], temblors[12], tombless[12], mobsters[12], bluesmen[12], nelumbos[12], submerse[12], slumbers[12], bluestem[12], embrutes[12], stumbler[12], tumblers[12], tumbrels[12], stumbles[12], overseen[11], oversees[11], resolves[11], overlent[11], leverets[11], overlets[11], ventless[11], voteless[11], solvents[11], severest[11], estovers[11], oversets[11], venulose[11], revenues[11], unreeves[11], nervules[11], overuses[11], revolute[11], truelove[11], evolutes[11], veloutes[11], ventures[11], outserve[11], vestures[11], solemner[10], boneless[10], noblesse[10], moreness[10], normless[10], terebene[10], telomere[10], elements[10], beetlers[10], molester[10], meetness[10], bonesets[10], semester[10], resmelts[10], smelters[10], termless[10], soberest[10], bolsters[10], lobsters[10], somerset[10], sorbents[10], monsters[10], bluenose[10], nebulose[10], blueness[10], suberose[10], muleteer[10], routemen[10], tubenose[10], muenster[10], tuberose[10], troubles[10], moulters[10], burstone[10], mounters[10], remounts[10], tubeless[10], subteens[10], sunbelts[10], muteness[10], tenesmus[10], outbless[10], subtones[10], blusters[10], bustlers[10], subrents[10], munsters[10], sternums[10], oestrums[10], strumose[10], nostrums[10], entresol[8], noteless[8], toneless[8], treeless[8], serenest[8], nestlers[8], solerets[8], estrones[8], selenous[8], enureses[8], neuroses[8], toluenes[8], resolute[8], turnsole[8], eusteles[8], tuneless[8], unsteels[8], setulose[8], streusel[8], trueness[8], tonsures[8]

7 letter words

nombles[11], berseem[11], beseems[11], tremble[11], temblor[11], boreens[9], enrobes[9], moreens[9], merlons[9], nemeses[9], blesser[9], seemers[9], orbless[9], morsels[9], sermons[9], element[9], telemen[9], beetler[9], reblent[9], beetles[9], mentees[9], serenes[7], resoles[7], senores[7], stelene[7]