| sheldrake | (noun) Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill | - |
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| (noun) large crested fish-eating diving duck having a slender hooked bill with serrated edges | Synonyms: fish duck, merganser, sawbill |
| shelduck | (noun) female sheldrake | - |
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| shelf | (noun) a support that consists of a horizontal surface for holding objects | - |
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| (noun) a projecting ridge on a mountain or submerged under water | Synonyms: ledge |
| shelfful | (noun) the amount that a shelf will hold | - |
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| shell | (noun) the hard largely calcareous covering of a mollusc or a brachiopod | - |
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| (noun) hard outer covering or case of certain organisms such as arthropods and turtles | Synonyms: carapace, cuticle, shield |
| (noun) ammunition consisting of a cylindrical metal casing containing an explosive charge and a projectile; fired from a large gun | - |
| (noun) a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners) | Synonyms: plate, scale |
| (noun) the housing or outer covering of something | Synonyms: case, casing |
| (noun) a very light narrow racing boat | Synonyms: racing shell |
| (noun) a rigid covering that envelops an object | - |
| (noun) the exterior covering of a bird's egg | Synonyms: eggshell |
| (noun) the hard usually fibrous outer layer of some fruits especially nuts | - |
| (noun) the material that forms the hard outer covering of many animals | - |
| shellac | (noun) a thin varnish made by dissolving lac in ethanol; used to finish wood | Synonyms: shellac varnish |
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| (noun) lac purified by heating and filtering; usually in thin orange or yellow flakes but sometimes bleached white | - |
| shellbark | (noun) North American hickory having loose grey shaggy bark and edible nuts | Synonyms: Carya ovata, shagbark, shagbark hickory, shellbark hickory |
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| sheller | (noun) a worker who removes shells (as of peas or oysters) | - |
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| shellfire | (noun) shooting artillery shells | - |
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| shellfish | (noun) invertebrate having a soft unsegmented body usually enclosed in a shell | Synonyms: mollusc, mollusk |
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| (noun) meat of edible aquatic invertebrate with a shell (especially a mollusk or crustacean) | - |
| shellflower | (noun) showy perennial of marshlands of eastern and central North America having waxy lanceolate leaves and flower with lower part creamy white and upper parts pale pink to deep purple | Synonyms: Chelone glabra, shell-flower, snake-head, snakehead, turtlehead |
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| (noun) cultivated for its shining oblong leaves and arching clusters of white flowers with pink shading and crinkled yellow lips with variegated magenta stripes | Synonyms: Alpinia speciosa, Alpinia Zerumbet, Languas speciosa, shall-flower, shell ginger |
| shelling | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, battery, bombardment |
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| shelter | (noun) a structure that provides privacy and protection from danger | - |
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| (noun) protective covering that provides protection from the weather | - |
| (noun) temporary housing for homeless or displaced persons | - |
| (noun) a way of organizing business to reduce the taxes it must pay on current earnings | Synonyms: tax shelter |
| (noun) the condition of being protected | Synonyms: protection |
| shelterbelt | (noun) hedge or fence of trees designed to lessen the force of the wind and reduce erosion | Synonyms: windbreak |
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| shelver | (noun) a worker who puts things (as books) on shelves | - |
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