effere effete effoff effore effort efreet efter- eototo eroto- errett etoeot etrez ettore f-zero feeror feetof feofor ferez ferfer feroze ferrer ferret ferrez ferro- fertee ferter fetter fetzer foerre foeto- foetor foofoo footer foozer forrer forrot fortee forter freeez freeof freeto freeze frefre frette froofe fterer fterre oerter oferre offeet oftfor oofotr oooooo ottoor ozette ozzero r-tree reefer reeffe refeet refeff refert refete refoot refret refter reroof reroot reteer reteet reteoo retere retore retort retree retret retro- retrot retter roofer rooter rootof rootte roozer rorter rotter rozzer t-tree t-zero teeoff teetee teeter terete terfez terreo terrer terret terror terrot terter tertre terzet tetete tetter to-fro toetoe toffee tofore toofer tooter tootoo toozoo torero torfer tororo torret tortor totoro totrot totter tozero treeof treete trefet trefor trefot trefte tretee trette troffe trooze trotro trotte tzetze zertz zezere zoozoo zorzor zotero