trademark has 5 distinct synonyms spread across 2 of its 4 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
a distinctive characteristic or attribute
a formally registered symbol identifying the manufacturer or distributor of a product
Synonyms, antonyms and the broader and narrower relations for trademark come from Princeton University’s WordNet. Full sources and licences.
register the trademark of
“The company trademarked their new gadget”