nominal has 6 distinct synonyms spread across 4 of its 7 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 one recorded opposite is real.
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.
of, relating to, or characteristic of an amount that is not adjusted for inflation
“the nominal GDP”
a phrase that can function as the subject or object of a verb
2 of the 7 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for nominal.
Synonyms, antonyms and the broader and narrower relations for nominal come from Princeton University’s WordNet. Full sources and licences.