Gwrthdal, n. counter payment
Gwrthdaro, n. a repulse
Gwrthdir, n. abutting land
Gwrthdor, n. refraction
Gwrthdrafod, n. contravention
Gwrthdramwy, n. retrogradation
Gwrthdrig, n. counter residence
Gwrthdrin, n. contravention
Gwrthdro, n. a turn back
Gwrthdroedion, n. antipodes