What is another word for "smooth"?

Roget's Thesaurus (1911) lists these synonyms for "smooth": accord, accordance, accubation, accumbent, agreement, all, alluvial, always, and, area, assimilate, azimuth, back, beam, become, billiard, bowling, butte, calm, clockwork, conform, conformably, conformity, connatural, connaturality, connaturalness, consistency, consistent, consonance, constancy, couch, couchant, cricket, croquet, dead, decumbence, decumbency, decumbent, discumbency, dissimilarity.