synthetic has 5 distinct synonyms spread across 5 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 analytic.
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.
involving or of the nature of synthesis (combining separate elements to form a coherent whole) as opposed to analysis
“limnology is essentially a synthetic science composed of elements...that extend well beyond the limits of biology”
systematic combining of root and modifying elements into single words
of a proposition whose truth value is determined by observation or facts
“`all men are arrogant' is a synthetic proposition”
a compound made artificially by chemical reactions
1 of the 7 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 synthetic.
Synonyms, antonyms and the broader and narrower relations for synthetic come from Princeton University’s WordNet. Full sources and licences.