WordNet records no synonym and no antonym for continuing trespass. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
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.
trespass that is not transient or intermittent but continues as long as the offending object remains
“dumping his garbage on my land was a case of continuing trespass”
Synonyms, antonyms and the broader and narrower relations for continuing trespass come from Princeton University’s WordNet. Full sources and licences.