Other hyponyms of digit include
binary digit,
octal digit,
decimal digit,
duodecimal digit,
hexadecimal digit,
significant digit,
significant figure,
0,
cipher,
cypher,
nought,
zero,
1,
ace,
I,
one,
single,
unity,
2,
deuce,
II,
two,
3,
deuce-ace,
III,
leash,
tercet,
ternary,
ternion,
terzetto,
three,
threesome,
tierce,
trey,
triad,
trine,
trinity,
trio,
triplet,
troika,
4,
four,
foursome,
IV,
quadruplet,
quartet,
quatern,
quaternary,
quaternion,
quaternity,
tetrad,
5,
cinque,
fin,
five,
fivesome,
Little Phoebe,
pentad,
Phoebe,
quint,
quintet,
quintuplet,
V,
6,
Captain Hicks,
half a dozen,
hexad,
sestet,
sextet,
sextuplet,
sise,
six,
sixer,
VI,
7,
heptad,
septenary,
septet,
seven,
sevener,
VII,
8,
eight,
eighter,
eighter from Decatur,
octad,
octet,
octonary,
ogdoad,
VIII,
9,
ennead,
IX,
Nina from Carolina,
nine,
niner.