Search Result for "rapidness": 
Wordnet 3.0

NOUN (1)

1. a rate that is rapid;
[syn: celerity, quickness, rapidity, rapidness, speediness]


The Collaborative International Dictionary of English v.0.48:

Rapidness \Rap"id*ness\, n. Quality of being rapid; rapidity. [1913 Webster]
WordNet (r) 3.0 (2006):

rapidness n 1: a rate that is rapid [syn: celerity, quickness, rapidity, rapidness, speediness]