WordNet records no synonym and no antonym for aberrate. It is the only member of each of its synsets, 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.
diverge from the expected
“The President aberrated from being a perfect gentleman”
diverge or deviate from the straight path; produce aberration
“The surfaces of the concave lens may be proportioned so as to aberrate exactly equal to the convex lens”
Synonyms, antonyms and the broader and narrower relations for aberrate come from Princeton University’s WordNet. Full sources and licences.