Importunate :: Importunate (a.) Hard to be borne; unendurable.
Importunator :: Importunator (n.) One who importunes; an importuner.
Importune :: Importune (a.) To request or solicit, with urgency; to press with frequent, unreasonable, or troublesome application or pertinacity; hence, to tease; to irritate; to worry..
Importunity :: Importunity (n.) The quality of being importunate; pressing or pertinacious solicitation; urgent request; incessant or frequent application; troublesome pertinacity.
Self-importance :: Self-importance (n.) An exaggerated estimate of one's own importance or merit, esp. as manifested by the conduct or manners; self-conceit..
Self-important :: Self-important (a.) Having or manifesting an exaggerated idea of one's own importance or merit.
Unimportance :: Unimportance (n.) Want of importance; triviality.