Use "?" for one missing letter: pu?zle. Use "*" for any number of letters: p*zle. Or combine: cros?w*d
Select number of letters in the word, enter letters you have, and find words!
A cermet is a composite material composed of ceramic (cer) and metallic (met) materials. More complex materials, known as Cermet 2 or Cermet II, are being utilized since they give considerably longer life in cutting tools while both brazing and grinding like tungsten carbide. — “Cermet - Wikipedia, the free encyclopedia”, en.wikipedia.org
But for the life of me I can't see where there is any cermet in a spark plug. Also Silicon Carbide and Silicon Nitride are not cermets, although they can be the ceramic part of a cermet with the addition of some metal. — “Talk:Cermet - Wikipedia, the free encyclopedia”, en.wikipedia.org