What is another word for "platform"?

Roget's Thesaurus (1911) lists these synonyms for "platform": abecedary, academic, academy, accost, accubation, accumbent, action, address, all, allocution, alloquy, alluvial, alma, ambo, amphitheater, and, apostrophe, apostrophize, appeal, area, arena, art, aside, audience, auditorium, azimuth, back, ball, battle, beam, bear, billiard, boarding, book, bowling, box, boxing, butte, button, call.