del due dup eld elf elm emf emu fed fem feu flu fud led leu lum med mel mud ped pud pul ump
delf duel dump dupe feud fled flue fuel fume leud lude lump meld mule pelf pled plum pule
duple flued flume flump fumed muled plume puled umped
Rhai geiriau ar hap: tungsten tuneless tuneably tuneable tumulous