high-rise has 1 distinct synonym spread across 1 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. Its one recorded opposite is low-rise.
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.
tower consisting of a multistoried building of offices or apartments
“`tower block' is the British term for `high-rise'”
used of buildings of many stories equipped with elevators; tall
“avenues lined with high-rise apartment buildings”
Synonyms, antonyms and the broader and narrower relations for high-rise come from Princeton University’s WordNet. Full sources and licences.