12-letter words containing r, u, b, s, o, m
- submolecular — of or relating to or caused by molecules: molecular structure.
- suboperculum — a bone in fishes behind the operculum or gill covering
- surmountable — to mount upon; get on the top of; mount upon and cross over: to surmount a hill.
- unburdensome — oppressively heavy; onerous.