appealing has 3 distinct synonyms 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 unappealing.
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.
able to attract interest or draw favorable attention
“He added an appealing and memorable figure to popular American mythology”
(of characters in literature or drama) evoking empathic or sympathetic feelings
“the sympathetic characters in the play”
Synonyms, antonyms and the broader and narrower relations for appealing come from Princeton University’s WordNet. Full sources and licences.