absolute has 7 distinct synonyms spread across 2 of its 6 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 relative.
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.
perfect or complete or pure
“absolute loyalty”
complete and without restriction or qualification; sometimes used informally as intensifiers
“absolute freedom”
something that is conceived or that exists independently and not in relation to other things; something that does not depend on anything else and is beyond human control; something that is not relative
“no mortal being can influence the absolute”
2 of the 6 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 absolute.
Synonyms, antonyms and the broader and narrower relations for absolute come from Princeton University’s WordNet. Full sources and licences.