Synonyms of 'sheath'
2 condomDictionary, rubber (US, informal), contraceptiveA rubber sheath placed over the erect penis stops sperm entering the vagina.
3 coveringDictionary, casing, caseIt grows on a nerve sheath within the spinal column.
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Vanilla is the seed case of a South American orchid.
A casing is a substance or object that covers something and protects it.
Bullet casings lay scattered on the ground.
Thesaurus for sheath from the Collins English Thesaurus
A sheath is a covering for the blade of a knife.