imperativeness vs insistency

imperativeness and insistency both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperativeness	Yes	No	No	No
insistency	Yes	No	No	No

As nouns, imperativeness and insistency are synonyms defined as:

imperativeness and insistency: the state of demanding notice or attention

Other synonyms of imperativeness include insistence, press, pressure.

imperativeness (noun)	insistency (noun)
the quality of being insistent	the act of insisting on something
the state of demanding notice or attention	the state of demanding notice or attention