attractive has no recorded synonym. 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 2 recorded opposites are unattractive, repulsive.
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.
pleasing to the eye or mind especially through beauty or charm
“a remarkably attractive young man”
having the properties of a magnet; the ability to draw or pull
“an attractive force”
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 attractive.
Synonyms, antonyms and the broader and narrower relations for attractive come from Princeton University’s WordNet. Full sources and licences.