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Synonyms for Formal (same or very similar meaning)

WordNet sense 1 (a lavish dance requiring formal attire):
ball

WordNet sense 2 (a gown for evening wear):
dinner dress, dinner gown, evening gown

WordNet sense 3 (represented in simplified or symbolic form):
schematic

WordNet sense 4 (of or relating to a style of art in which objects do not resemble those known in physical nature):
nonrepresentational

WordNet sense 5 (having official authority or sanction):
official

WordNet sense 6 (capable of or reflecting the capability for correct and valid reasoning):
logical

WordNet sense 7 (rigidly formal):
buckram, stiff

WordNet sense 8 (as a formality only):
perfunctory

WordNet sense 9 (existing in name only):
nominal

WordNet sense 10 (rigidly formal or bound by convention):
ceremonious, conventional

WordNet sense 11 (marked by pomp or ceremony or formality):
ceremonial

WordNet sense 12 (refined or imposing in manner or appearance; befitting a royal court):
courtly, stately


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