数字【すうじ】
numeral, figure, digit, numeric character
数える【かぞえる】
to count, to enumerate
人数【にんずう】
the number of people, many people, a large number of people
複数【ふくすう】
plural, multiple, several
数学【すうがく】
mathematics
数時間【すうじかん】
a few hours, several hours, a couple of hours
人数【ひとかず】
the number of people, (being counted as an) adult
多数【たすう】
large number (of), many, majority
数々【かずかず】
many, numerous, various, large number of
回数【かいすう】
number of times, frequency, count
数値【すうち】
numerical value, numerics, reading (on a meter, etc.)
数年前【すうねんまえ】
a few years ago, some years back
無数【むすう】
innumerable, countless, numberless
周波数【しゅうはすう】
frequency (esp. of waveforms)
少数【しょうすう】
small number, few, minority
半数【はんすう】
half the number, haploid
過半数【かはんすう】
majority
総数【そうすう】
total (number), count
数量【すうりょう】
quantity, volume, amount
日数【にっすう】
number of days