Gwrthadrodd, a counter recital
Gwrthaddysg, n. heresy
Gwrthagwedd, n. counter form
Gwrthaing, n. a wedge
Gwrthair, n. antiphrasis
Gwrthalw, n. a recal
Gwrthallu, n. opposing power
Gwrthamcan, n. counter project
Gwrthanfon, n. a sending adversely
Gwrthanian, n. contrary nature