There is no number that starts with A
Another name for a set of natural numbers is counting numbers.
Another name for mercury is quicksilver.
Another name for 'rational' is "numbers that are equal to the ratio of two whole numbers". Another name for 'irrational' is "numbers that are not equal to the ratio of any two whole numbers".
complicated numbers
Real numbers.
quoin
embrace
typhoon
oblong
Dragoon
Motto.
Yahweh