shoddiness vs flimsiness

shoddiness and flimsiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoddiness	Yes	No	No	No
flimsiness	Yes	No	No	No

As nouns, shoddiness and flimsiness are synonyms defined as:

shoddiness and flimsiness: the property of weakness by virtue of careless construction

shoddiness (noun)	flimsiness (noun)
the property of weakness by virtue of careless construction	the property of weakness by virtue of careless construction
the quality of being cheaply imitative of something better