defect

Desert (a cause, a country or an army), often in order to join the opposing cause, country, or army.

A mark or flaw that spoils the appearance of something (especially on a person's body).

An imperfection in an object or machine.

“if there are any defects you should send it back to the manufacturer”

A failing or deficiency.

“that interpretation is an unfortunate defect of our lack of information”

An imperfection in a bodily system.

“visual defects”

“this device permits detection of defects in the lungs”