Here is some dream symbol starting with the letter C.

Cactus : This dream symbol is associated with the following characteristics:
1. Unapproachable
2. Being defensive.
3. Hardy, like a cactus’ survivabilty in the desert.

Camel : Associated with the qualities of this animal as such stamina, patience,  and perseverance. May also indicate being burdened.

Captain : An aspect of self that is authoritative. May also denote the ability to view situation from a broad perspective.

Cemetery : 1. Associated with things, memories and experiences in life that are buried or hidden away.
2. Associated with one’s feelings about death and mortality.

Cloud : Denotes something that obscures and confuses.

Clown : 1. May represent an aspect of oneself with the characteristic of a clown.
2. Denotes hiding our true nature.