tenfold

from WordNet (r) 3.0 (2006)

tenfold
    adv 1: by ten times as much; "the population increased tenfold"
    adj 1: containing ten or ten parts [syn: {tenfold}, {ten-fold},
           {denary}]

from The Collaborative International Dictionary of English v.0.48

Tenfold \Ten"fold`\, a. & adv.
   In tens; consisting of ten in one; ten times repeated.
   [1913 Webster]

         The grisly Terror . . . grew tenfold
         More dreadful and deform.                --Milton.
   [1913 Webster]