Cydfodd, n. concord, agreemen
Cydfrad, n. conspiracy, plot
Cydfynediad, n. concomitancy
Cydffrydiad, n. a confluence
Cydffurfiad, n. a conformation
Cydffurfio, v. to conform
Cydgais, n. a competition
Cydgam, n. dalliance; delay
Cydganu, v. to sing in concert
Cydgar, n. a correlative