indeterminate has 1 distinct synonym 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 one recorded opposite is determinate.
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 precisely determined or established; not fixed or known in advance
“of indeterminate age”
having a capacity for continuing to grow at the apex
“an indeterminate stem”
3 of the 5 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 indeterminate.
Synonyms, antonyms and the broader and narrower relations for indeterminate come from Princeton University’s WordNet. Full sources and licences.