CENOBITE is a 8 letter word that starts with C.
\Cen"o*bite\, n. [L. coenobita, fr. Gr. koino`bios;
koino`s common + bi`os life: cf. F. c['e]nobite.]
One of a religious order, dwelling in a convent, or a
community, in opposition to an anchoret, or hermit, who lives
in solitude. --Gibbon.