insistency vs imperativeness

insistency and imperativeness both are nouns.

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

As nouns, insistency and imperativeness are synonyms defined as:

insistency and imperativeness: the state of demanding notice or attention

Other synonyms of insistency include insistence, press, pressure.

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