nonnative has 1 distinct synonym spread across 1 of its 3 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 native.
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.
not being or composed of aborigines
“the nonnative population of South Africa”
of persons born in another area or country than that lived in
“our large nonnative population”
1 of the 3 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 nonnative.
Synonyms, antonyms and the broader and narrower relations for nonnative come from Princeton University’s WordNet. Full sources and licences.