e-i-e-i- e-series eesterus effusers ess-tset essertes estruses euresist eustress eutresis fee-fees feistier ferreter ferrette ferretti ferriere ferrites ferrurie fetterer feuterer fieriest fir-tree fire-set firesets firetest firrette firstest firsties firsttee firtrees fissures freeseer freesite freester fressies fretters frettest frettir frisette friseurs friterie fritters fruiters fruitier fruitist fruitset fruiture furfures furifuff furifuri furriers furriest fursuits fussiest fusterer fustiest futurise futurist i-ii-iii isistius isittrue isturits re-fuses re-tries re-users referees referers referree referrer refitter refusers refusest refuters refutest reifiers reiserfs reissuer reissues rerefers rerefief reseiser resetter resister restiest restiffs restitue restress restuffs resuffer retirees retirers retirest retretti reutters rierreef riffiest ritesite rusesti rustiest ruttiers ruttiest s-series seissure serretes sestette sestiere setsfree siruseri sissiest steerers steerest stefesti sterrett sterritt steti stiffest stiffies stirrers stirrest streeter stresses strutter stuffers stuffest stuffier stuffies stuffure sturtite stutters suessite sufferer suffetes suffrete suffuses suiterer suitress surefire suresure sureties surfeits surfiest sussurus susurrus t-series t-street teffites terester terestr- terriers terrifie territet teruteru testfire testiere testiest testitis testsite tirsitei titterer treefree treetise treffurt treittie tresette tressure tretises tri-fest triester triftsee trisette trissett triturus trussers trussure trusteer trustees trustest trustier trusties tsiistre tsrister tufestii tuftiest turfiest turfites turriers turritis userfees usersfee usufruit uteritis uteruses utterers utteress utterest