-ene -one eeee eefe eefn eero eeze efen efeo efon efor efze enee eneo ener enez enfp enne eno- enoe enon enp- enzo eone eore epee epen eper epon epor eppo eppp epro eprp eren erer erez erne erno eroe eron eroo erpe erre erro ezer ezop ezzo feen feer fefe feff fefo fene fenn feof feon fere fern fero ferr ferz ffee ffff ffrr foer fofo fone fono fonz foof foon fopp for- fore forn foro forr fprf free fren freo frep froe fron frop neef neen neep neer nefe neff nene neno neo- neon neoo nepe nepr nere nerf nero nerr nerz nfer nfff nfon nnnn nnpr noer noez non- none nonn nono noo- noon nooo noop noor nope nor- nore norf norn noro norr nren nron nrpn nzpp o-eo oen- oeno oere ofen ofer off- offe offo offr ofno ofor ofoz ofre one- onee oneo onep oner onez onne onno onon onor onoz onze onzo ooer ooff oone oooo oore ooze open opep oper opo- opon opor oppo ore- oren oreo orer orfe orff orne orno oro- oroe orof oron oror oroz orpe orro orzo ozee ozen ozer ozon peen peep peer peff pen- pene penn peno penz peon peor pepe pepo per- pere perf pern pero perp perr peze pezo pfff pffr pnon pnpo pnpp pnro poer poff pone pono ponp poof poon poop poor pop- pope popo popp pore porn poro porr porz poze pozo ppen pper pppn pppo pppp pprf pre- pree pref pren prep prez prnp pro- proe prof pron proo prop proz reef reen reep refe reff refn refr rene renn reno renz reof reop repe repo repp repr rere rero reze rfef roen roer rofe roff rofo rone rono roof roon roop roor rooz rope ropo rore roro roze rozz rpoe rpof rpon rppn rrrr z-ro zeep zeff zenn zeno zeon zepo zepp zerf zero zeze znen zoff zon- zone zoo- zoon zoop zope zopf zore zorn zoro zozo zrze zzzz