Gwastadfa, n. a level space
Gwastadfod, n. constant state
Gwastadiad, n. a levelling
Gwastadle, n. level place
Gwastadol, uniform, continued
Gwastadoldeb, n. continuity
Gwastadrwydd, n. eveness
Gwastadu, v. to make level
Gwastata, v. to be steady
Gwastatâd, n. making steady