Wordnet 3.0
ADJECTIVE (1)
1. 
 too numerous to be counted; 
- Example: "incalculable riches"- Example: "countless hours"- Example: "an infinite number of reasons"- Example: "innumerable difficulties"- Example: "the multitudinous seas"- Example: "myriad stars"- Example: "untold thousands"[syn: countless, infinite, innumerable, innumerous, multitudinous, myriad, numberless, uncounted, unnumberable, unnumbered, unnumerable]
WordNet (r) 3.0 (2006):
unnumberable
    adj 1: too numerous to be counted; "incalculable riches";
           "countless hours"; "an infinite number of reasons";
           "innumerable difficulties"; "the multitudinous seas";
           "myriad stars"; "untold thousands" [syn: countless,
           infinite, innumerable, innumerous, multitudinous,
           myriad, numberless, uncounted, unnumberable,
           unnumbered, unnumerable]