Dictionary & Thesaurus

1.

(noun) the quickness of action or occurrence; "the immediacy of their response"; "the instancy of modern communication"

Synonyms: immediacy, immediateness, instantaneousness

Related Words: celerity, quickness, rapidity

2.

(noun) urgently demanding attention; "the insistence of their hunger"; "he pressed his demand with considerable instancy"

Synonyms: imperativeness, insistence, insistency

Related Words: urgency