Cydgarenydd, n. consanguinity
Cydgerdd, n. a symphony
Cydgerddediad, n. concomitancy
Cydglymiad, n. alligation
Cydgnawd, n. carnal copulation
Cydgor, n. united choir
Cydgorffoli, v. to concorporate
Cydgorffori, v. to consubstantiate
Cydgwyniad, n. condolence
Cydgyfaneddu, v. to occupy together