defect vs defection

defect and defection both are nouns.

Word	Noun	Adjective	Verb	Adverb
defect	Yes	No	Yes	No
defection	Yes	No	No	No

defect (noun)	defection (noun)
a mark or flaw that spoils the appearance of something (especially on a person's body)	withdrawing support or help despite allegiance or responsibility
a failing or deficiency	the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)
an imperfection in an object or machine
an imperfection in a bodily system

defect (verb)	defection (verb)
desert (a cause, a country or an army), often in order to join the opposing cause, country, or army