Imperfection
Defective
Flaw
The abstract noun form of the adjective 'defective' is defectiveness, a word for a quality; a word for a concept.The word 'defective' is the adjective form of the noun 'defect', which can be an abstract or concrete noun depending on the context in which it is used.
The Russian decided to defect.
Here are some sentences.Will the spy defect to our country?She will defect once she escapes from her escort.
Dosh.
Defect
imperfectionflawmistakedrawbackfailingirregularityerrorshortcomingweaknesschinkfaultbug
flaw
An occurrence in which one defect prevents the detection of another. [After IEEE 610]. It is same as Defect Masking.
Here are some sentences.Will the spy defect to our country?She will defect once she escapes from her escort.
Optical Dysentry