scotch tape has 3 distinct synonyms spread across 2 of its 2 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.
transparent or semitransparent adhesive tape (trade names Scotch tape and Sellotape) used for sealing or attaching or mending
fasten or attach with sellotape
“The hotel manager scotch taped a note to the guest's door”
Synonyms, antonyms and the broader and narrower relations for scotch tape come from Princeton University’s WordNet. Full sources and licences.