tramontane has 2 distinct synonyms spread across 2 of its 3 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 cismontane.
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.
on or coming from the other side of the mountains (from the speaker)
“the transmontane section of the state”
a cold dry wind that blows south out of the mountains into Italy and the western Mediterranean
1 of the 3 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for tramontane.
Synonyms, antonyms and the broader and narrower relations for tramontane come from Princeton University’s WordNet. Full sources and licences.