Cupboard, cabinet: 1. Issues within oneself that are hidden or  not addressed.
2. Hoarding of resources, if cupboard is full.
Cut: 1. a need to remove something or someone from one’s life.
2.Feeling wounded
Cycling a bicycle may mean trying to juggle or balance some situation

Dream Symbols and their potential meanings start with C.
Collision: May be associated with conflict in areas such as interpersonal relationships.
Corpse: Associated with lifelessness or something that has expired.
Courtroom: Associated with judgement and being judged.
Crack: 1. Entry point / breakthrough
2. Reaching the limit/ breaking point.
3. A loophole.
Crow: Represents darker, unpleasant and irritating aspect of self.
Crystal: Indicative [...]

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 [...]