1.
a polygon with nine sides - nonagon
2.
a musical group of nine performers - nonet
3.
nine times as many - nonuple
4.
number 1 followed by 30 zeros - nonillion
5.
a nine-day period of prayer - Novena
6.
originally the ninth month - November
7.
lasting nine years - Novennial
8.
a very large number - Novemdecillion
9.
relating to the number ten - Decimal
10.
one-tenth of a meter - Decimeter
11.
one-tenth of a liter - Deciliter
12.
a unit measuring sound intensity - Decibel
13.
to kill one out of every ten soldiers
14.
one of ten equal parts - Decile
15.
to decode or figure out - Decipher
16.
a ten-sided polygon - Decagon
17.
a period of ten years - Decade
18.
an athletic contest with ten events
19.
the Ten Commandments - Decalogue
20.
an animal with ten feet - Decapod
22.
a solid with ten faces - Decahedron
23.
one hundred years - Century
24.
one hundredth of a meter - Centimeter
25.
an insect with 100 legs - Centipede
