effere effete effoff effore efreet efter- eototo eroto- errett etoeot ettore feeror feetof feofor ferfer ferrer ferret ferro- fertee ferter fetter foerre foeto- foetor foofoo footer forrer forrot fortee forter freeof freeto frefre frette froofe fterer fterre oerter oferre offeet oftfor oofotr oooooo ottoor 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 rorter rotter t-tree teeoff teetee teeter terete terreo terrer terret terror terrot terter tertre tetete tetter to-fro toetoe toffee tofore toofer tooter tootoo torero torfer tororo torret tortor totoro totrot totter treeof treete trefet trefor trefot trefte tretee trette troffe trotro trotte