| noun | an imperfection in a bodily system “visual defects” |
| noun | a failing or deficiency “that interpretation is an unfortunate defect of our lack of information” |
| noun | an imperfection in an object or machine “a flaw caused the crystal to shatter” |
| noun | a mark or flaw that spoils the appearance of something (especially on a person's body) “a facial blemish” |
| verb | desert (a cause, a country or an army), often in order to join the opposing cause, country, or army “If soldiers deserted Hitler's army, they were shot” |
| faulty | adjective | having a defect |
| flaw | verb | add a flaw or blemish to; make imperfect or defective |
| blemish | verb | mar or spoil the appearance of |
| mar | verb | make imperfect |
| defection | noun | the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes) |
| defector | noun | a person who abandons their duty (as on a military post) |
| desertion | noun | the act of giving something up |
| deserter | noun | a disloyal person who betrays or deserts his cause or religion or political party or friend etc. |