insalubrity vs insalubriousness

insalubrity and insalubriousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
insalubrity	Yes	No	No	No
insalubriousness	Yes	No	No	No

As nouns, insalubrity and insalubriousness are synonyms defined as:

insalubrity and insalubriousness: the quality of being insalubrious and debilitating

insalubrity (noun)	insalubriousness (noun)
the quality of being insalubrious and debilitating	the quality of being insalubrious and debilitating