normal has 4 distinct synonyms spread across 1 of its 5 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its 2 recorded opposites are abnormal, paranormal.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
conforming with or constituting a norm or standard or level or type or social norm; not abnormal
“serve wine at normal room temperature”
in accordance with scientific laws
being approximately average or within certain limits in e.g. intelligence and development
“a perfectly normal child”
1 of the 5 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for normal.
Synonyms, antonyms and the broader and narrower relations for normal come from Princeton University’s WordNet. Full sources and licences.
something regarded as a normative example
“the convention of not naming the main character”