covering has 6 distinct synonyms spread across 3 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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 natural object that covers or envelops
“under a covering of dust”
Synonyms, antonyms and the broader and narrower relations for covering come from Princeton University’s WordNet. Full sources and licences.
an artifact that covers something else (usually to protect or shelter or conceal it)
the act of concealing the existence of something by obstructing the view of it
“the cover concealed their guns from enemy aircraft”
the act of protecting something by covering it
the work of applying something
“the doctor prescribed a topical application of iodine”