Wordnet 3.0
NOUN (1)
1. 
 the cardinal number that is the sum of six and one; 
[syn: seven, 7, VII, sevener, heptad, septet, septenary]
WordNet (r) 3.0 (2006):
sevener
    n 1: the cardinal number that is the sum of six and one [syn:
         seven, 7, VII, sevener, heptad, septet,
         septenary]