Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
tăpēte, is, n. (sing. acc. m. tapeta fulgentem, Sil. 4, 270; plur. tapetia, Plaut. Ps. 1, 2, 14; id. Stich. 2, 2, 54; Vulg. 2 Reg. 17, 28; but nom. tapeta, from unused tapetum, Lucil. ap. Prob. p. 130: tapetae, Enn. ap. Fest. p. 351 Müll.; Placid. Gloss.; acc. m. tapetas pulcros, Verg. A. 9, 358; abl. tapetibus, id. ib. 9, 325; Liv. 40, 24, 7; Ov. M. 13, 638; Varr ap. Non. 542, 15: tapetis, Verg. A. 7, 277 Serv. ad loc.; Mart. 14, 147, 1; cf. the Gr. forms from τάπης, and v. Neue, Formenl. 2, 570 sq.); cloth wrought with figures in different colors, for covering walls, floors, tables, couches, etc., a carpet, tapestry, hangings, coverlet, etc. (syn. stragulum); sing. nom. tapete, Turp. and Caecil. ap. Non. 229, 7, and 542, 18; abl. tapete, Sil. 17, 64.