Synonyms: immediacy, immediateness, instancy, instantaneousness
Definition: the quickness of action or occurrence
Usage: the immediacy of their response; the instancy of modern communication
Similar words: quickness, rapidity, rapidness, speediness, celerity
Definition: a rate that is rapid
Synonyms: instancy, imperativeness
Definition: the quality of being insistent
Usage: he pressed his demand with considerable instancy
Similar words: urgency
Definition: pressing importance requiring speedy action
Usage: the urgency of his need