CAMPHORATE is a 10 letter word that starts with C.

1. \Cam"phor*ate\, v. t.
   To impregnate or treat with camphor.
   
   

2. \Cam"phor*ate\, n. [Cf. F. camphorate.] (Chem.)
   A salt of camphoric acid.
   
   

3. \Cam"phor*ate\, Camporated \Cam"por*a`ted\,
   Combined or impregnated with camphor.
   
   {Camphorated oil}, an oleaginous preparation containing
      camphor, much used as an embrocation.