Nouns

(n)carbon black, lampblack, soot, smut, crocka black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink
(n)crocknonsense; foolish talk“that's a crock”
(n)crock, earthenware jaran earthen jar (made of baked clay)

Verbs

(v)crockrelease color when rubbed, of badly dyed fabric
(v)crocksoil with or as with crock