numbers pool vs numbers

numbers pool and numbers both are nouns.

Word	Noun	Adjective	Verb	Adverb
numbers pool	Yes	No	No	No
numbers	Yes	No	No	No

As nouns, numbers pool and numbers are synonyms defined as:

Other synonyms of numbers pool include numbers game, numbers racket.

numbers pool (noun)	numbers (noun)
an illegal daily lottery	an illegal daily lottery