FOSSILISED

de do ed ef el es fe id if is li lo od oe of oi os si so

def del die dif dis doe dol dos eds efs eld elf els ess fed fes fid fie fil foe ids ifs led lei les lid lie lis ode ods oes oil old ole ose sei sel sis sod sol sos

defi deil delf deli dels diel dies difs diol diss does dole dols dose doss elds feds feod fess fido fids file filo fils fled floe foes foil fold foss ides idle idol isle leis less lido lids lied lief lies life lode loid lose loss odes oils olds oles oses seif seis self sels side sild silo sled slid sloe sods soil sold sole soli sols