Rea-son-a-ble, rhesymol, teg, cymhwys
Re-ceiv-a-ble, derbyniadwy
Re-cep-ta-cle, derbynfa; cuddfa
Re-cip-i-ent, derbyniedydd, derbynydd
Re-cip-ro-cal, adgyrchiol, cylchgyfnewidiol
Rec-i-ta-tion, mynegiaeth
Re-cog-ni-zance, cydnabyddiaeth
Rec-og-ni-tion, cydnabyddiad
Rec-ol-lec-tion, adgofiant, adfeddiol
Re-con-noi-tre, llygadolrhain, adolygu