Gwrthgefn, n. a support
Gwrthgerdd, n. retrograde course
Gwrthgerydd, n. recrimination
Gwrthgil, n. a receding, a revolt
Gwrthgiliwr, n. a back-slider, a seceder, an apostate
Gwrthgis, n. retort, a rebuff
Gwrthglawdd, n. contravalation
Gwrthgloch, n. a resounding, an echo
Gwrthgred, n. a counter belief
Gwrthgri, n. a counter clamour