Englishdefect1
(stress on the first syllable)
noun
a defect in the software:
fault, flaw, imperfection, deficiency, weakness, weak spot/point, inadequacy, shortcoming, limitation, failing, obstruction;
snag, kink, deformity, blemish, taint, crack, break, tear, split, scratch, chip, fracture, spot;
mistake, error;
Computing bug, virus;
informal glitch, gremlin.