pressing vs imperative

pressing and imperative both are nouns.

Word	Noun	Adjective	Verb	Adverb
pressing	Yes	Yes	No	No
imperative	Yes	Yes	No	No

pressing (noun)	imperative (noun)
the act of pressing; the exertion of pressure	some duty that is essential and urgent
a metal or plastic part that is made by a mechanical press	a verb in the imperative mood.
	a mood that expresses an intention to influence the listener's behavior

pressing (adjective)	imperative (adjective)
compelling immediate action	requiring attention or action
	relating to verbs in the imperative mood