Flaw
Fault
Synonyms: Defect, fault, deficiency, weak spot/point, shortcoming, failing, shortfall, lack, omission, kink, taint, fissure, tear, scratch, fracture, mistake, bug, glitch, blemish, imperfection, weakness, inadequacy, limitation, foible, insufficiency, want, snag, deformity, crack, break, split, chip, spot, error, virus, and gremlin.
Imperfection
Synonyms: Defect, fault, deficiency, weak spot/point, shortcoming, failing, shortfall, lack, omission, kink, taint, fissure, tear, scratch, fracture, mistake, bug, glitch, blemish, imperfection, weakness, inadequacy, limitation, foible, insufficiency, want, snag, deformity, crack, break, split, chip, spot, error, virus, and gremlin.
Example Sentences
There was a flaw in the design.
Her plan had one major flaw.
A small flaw ruined the entire painting.
They found a flaw in the system.
His only flaw was impatience.
The diamond had a tiny flaw.
That argument has a logical flaw.
Even perfect things may have a flaw.
The flaw in the code caused the crash.
She noticed a flaw in the pattern.