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]