Wordnet 3.0
NOUN (1)
1. 
 the cardinal number that is the sum of eight and one; 
[syn: nine, 9, IX, niner, Nina from Carolina, ennead]
WordNet (r) 3.0 (2006):
niner
    n 1: the cardinal number that is the sum of eight and one [syn:
         nine, 9, IX, niner, Nina from Carolina, ennead]