Ceremonial, a. Ritualistic, formal, official, ministerial, pompous, sumptuous, scenic, functional.
Ant. Private, unostentatious, undramatic, unimposing, unassuming.
Ceremonious. Stately, lofty, courtly; formal, studied, punctilious; prim, precise.
Ant. Brusk, blunt, supercilious, plain, simple.
Certain. Sure, infallible, positive, undeniable, unfailing; assured, fixed, regular, established; true, accurate, unmistakable.
Ant. Dubious, irregular, undecided, doubtful, exceptional, casual.
Certainty. Assurance, conviction, confidence, positiveness.
Ant. Hesitation, doubt, misgiving, conjecture, indecision.
Certify. Acknowledge, avow, declare, prove, inform, assure, attest.
Ant. Disavow, misinform, disprove.