Cydbell, a. equidistant
Cydblaid, n. a confederate
Cydbwys, a. of equal weight
Cydbwyso, v. to equipoise
Cyd-ddwyn, v. to concur
Cyd-dynu, v. to concur
Cyd-ddyoddef, v. to endure together
Cyd-ddyrchafu, to exalt together
Cydeffeithiad, n. connutrition
Cydenw, n. namesake