Cymdeithydd, n. a companion
Cymhar, n. partner
Cymhares, n. a partner
Cymhariad, n. comparing
Cymhariaeth, n. comparison
Cymharol, a. paired, coupled
Cymharu, v. to pair; to compare
Cymharwr, n. comparer
Cymheri, n. pertubation
Cymhell, n. compulsion: v. to compel; to instigate; to offer