-tree c-cor c-tec ccccc ccett cech ceche cecht ceco- ceere ceoce ceoor cerc- cerce cerco cerec cerer ceret cero- ceroc cerre cerro certe ceto- cette chech cheer cheet cheho chehr cheo chere chero chert chete cheth cheto chett chher choco choor chor- chore choro chort chote chott co-co cocc- cocce cocco coceo coche cocto coete cohee cohoe cohoo cooch cooee cooer coore coote cooth corce core- coree corer coro- corot corre corte corto cotch coter cothe cott- cotte cotto crece creer creo- creot crete croce croco crooe croot crore crote croth crott ctree cttee eccho echte ecthr ecto- ector ectot eeeee eetch ehret eocho eorre erech erect erere eroor erore eroto error erte erter erthe etche etete ether etho- ethoc etoro etree etter h-cho hcooh he-he he-ro hecco heche hecht hect- hecte hecto heere heete hehte heore herce heroe herre herro herte herth herto hetch heter hethe hette hetto hheth hhhhh ho-ho ho-oh hocco hoche hohoe hohot hooce hooch hooer hoore hoort horce horch horhe horre horro horth horto hotch hothe hothr hotot hotte hotto hreoc hrere hroch hthrt htree ocher ochre ochro ocoee ocote ocree octet octo- octor oeco- oerth oh-oh ohchr ohrot ohthe oo-er oocre ooher ooooh ooooo oothe orcet orech oreco oreo- orere orero oroch oroco oroer orret orter ortet orth- orthe ortho ortoo otere otero other othre otoce ototo otter r-co- recce recco recet reche recht rect- recte recto reece reech reere reerh reeth rehco reher rehet rehoe rere- reree reret retch retee reter rethe retro rette retto rheo- rhett rhoeo ro-ro rocco roche rocht rocor roero rooer roore roote rorer rotch roter rothe rotho roto- rotor rotot rotte rotto tecch teche techo teech teeth tehee teoco terce terco teret teror terre terro tert- tetch teter tethe tetr- tetro tette thec- thect theer theo- theoc theor ther- there thero thete theth thoch thore thoro thorr thort thoth thre- three threo thret throe throo throt to-ho tocco toche toco- toece toerr toeto toher tohoe tohot toore tooth torce torch toreo toret torht torre torro torte torto toter tothe toto- totoe totoo totte treco treer treet trere trete trett troch troco troee troth trott ttttt