siamese has 5 distinct synonyms spread across 7 of its 7 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.
Synonyms, antonyms and the broader and narrower relations for siamese come from Princeton University’s WordNet. Full sources and licences.
an inlet with two or more couplings to which a hose can be attached so that fire engines can pump water into the sprinkler system of a building
a slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip