What is another word for "supine"?

Roget's Thesaurus (1911) lists these synonyms for "supine": about, accubation, accumbent, all, alluvial, anastrophe, and, area, azimuth, back, beam, before, billiard, bottom, bowling, butte, calm, capsize, cart, contraposition, contrariety, contrary, couch, couchant, cricket, croquet, dead, decumbence, decumbency, decumbent, discumbency, down, esplanade, estrade, even, eversion, fell, flat, flatness, flatten.