Pillowcase

Noun

 * 1) A washable, easily removable cloth cover for pillows.

Synonyms

 * pillowslip

Thesaurus
afghan, bed linen, bedclothes, bedcover, bedding, bedsheet, bedspread, blanket, buffalo robe, case, clothes, comfort, comforter, contour sheet, counterpane, cover, coverlet, coverlid, eiderdown, fitted sheet, lap robe, linen, patchwork quilt, pillow slip, quilt, robe, rug, sheet, sheeting, slip, spread

Alternative forms

 * pillow case

Etymology
pillow + case