variable vs variate

variable and variate both are nouns.

Word	Noun	Adjective	Verb	Adverb
variable	Yes	Yes	No	No
variate	Yes	No	No	No

As nouns, variate is a hyponym of variable; that is, variate is a word with a more specific, narrower meaning than variable:

variable (noun)	variate (noun)
a quantity that can assume any of a set of values	a variable quantity that is random
a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
something that is likely to vary; something that is subject to variation
a star that varies noticeably in brightness

variable (adjective)	variate (adjective)
liable to or capable of change
(used of a device) designed so that a property (as e.g. light) can be varied
marked by diversity or difference