offence has 5 distinct synonyms spread across 5 of its 5 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 defence.
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 offence come from Princeton University’s WordNet. Full sources and licences.
the team that has the ball (or puck) and is trying to score
a lack of politeness; a failure to show regard for others; wounding the feelings or others
a transgression that constitutes a violation of what is judged to be right