e-i-e-i- e-series eeryerie ess-tset essertes esterify eyetests fee-fees feistier ferreter ferrette ferretti ferriere ferrites fetterer fieriest fir-tree fire-eye fire-set firesets firetest firrette firstest firsties firsttee firtrees freeseer freesite freester fressies fretters frettest frettir frisette friterie fritters i-ii-iii re-tries referees referers referree referrer refitter reifiers reiserfs rerefers rerefief reseiser resetter resister restiest restiffs restress retirees retirers retirest retretti reyerite rierreef riffiest ritesite s-series serretes sestette sestiere setsfree seyresse sirystes sissiest steerers steerest stefesti sterrett sterritt steti stiffest stiffies stir-fry stirrers stirrest streeter streetys stresses syrettes t-series t-street teffites terester terestr- terreity terriers terrifie territet testfire testiere testiest testitis testsite tirsitei titterer treefree treetise treittie tresette tretises tri-fest triester triftsee trisette trissett trysters tsiistre tsrister yessiree yftisite yiffiest ytterite