Synonyms for Unimportance:

n.

indifference, Insignificancy, inconsequentialness, Inconsequentiality, concern. humbleness (noun)
obscureness.
immateriality (noun)
triviality, worthlessness.
indifference (noun)
inconsequentialness, Inconsequentiality, Insignificancy, inconsequence.
insignificance (noun)
worthlessness, inconsequence, triviality.
unimportance (noun)
inconsequence, humbleness, banality, triflingness, trivia, triteness, minutia, insignificance, irrelevance, frivolity, obscureness, insipidity.

Other synonyms:

inconsequentialness, Inconsequentiality, Insignificancy. indifference. Other relevant words:
obscureness, Insignificancy, triviality, indifference, humbleness, Inconsequentiality, inconsequentialness, worthlessness.

Usage examples for unimportance

  1. On account of his unimportance Monsieur de la Mole did not answer to her needs. – Marguerite de Valois by Alexandre Dumas
  2. And amid all the tragedy of his heart, and all his apprehensions concerning hollow, worldly success, little thoughts of absurd unimportance kept running about like clockwork mice in his head. – The Card, A Story Of Adventure In The Five Towns by Arnold Bennett