drawing vs numbers pool

drawing and numbers pool both are nouns.

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

As nouns, numbers pool is a hyponym of drawing; that is, numbers pool is a word with a more specific, narrower meaning than drawing:

drawing: players buy (or are given) chances and prizes are distributed by casting lots
numbers pool: an illegal daily lottery

Other hyponyms of drawing include tombola, lucky dip, numbers, numbers game, numbers racket, raffle, sweepstakes.

drawing (noun)	numbers pool (noun)
the creation of artistic pictures or diagrams	an illegal daily lottery
act of getting or draining something such as electricity or a liquid from a source
players buy (or are given) chances and prizes are distributed by casting lots
the act of moving a load by drawing or pulling
a representation of forms or objects on a surface by means of lines
an illustration that is drawn by hand and published in a book, magazine, or newspaper