WordNet records no synonym and no antonym for creeps. 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.
a disease of cattle and sheep attributed to a dietary deficiency; characterized by anemia and softening of the bones and a slow stiff gait
a feeling of fear and revulsion
“he gives me the creeps”
Synonyms, antonyms and the broader and narrower relations for creeps come from Princeton University’s WordNet. Full sources and licences.