Rhesymu, v. to reason, to argue
Rheth, n. a pervading quality
Rhrethren, n. a pike, a lance
Rhëu, v. to run about; to move
Rheuedd, n. activity, agility
Rhew, n. what is slippery; frost
Rhewi, v. to freeze; to be ice
Rhewiad, n. a freezing
Rhewlyd, a. freezing, frosty
Rhewyn, n. a drain, a gutter