material has 7 distinct synonyms spread across 4 of its 11 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 immaterial.
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.
derived from or composed of matter
“the material universe”
directly relevant to a matter especially a law case
“his support made a material difference”
having material or physical form or substance
“that which is created is of necessity corporeal and visible and tangible”
having substance or capable of being treated as fact; not imaginary
“the substantial world”
information (data or ideas or observations) that can be used or reworked into a finished form
“the archives provided rich material for a definitive biography”
a person judged suitable for admission or employment
“he was university material”
2 of the 11 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 material.
Synonyms, antonyms and the broader and narrower relations for material come from Princeton University’s WordNet. Full sources and licences.