lottery vs tombola

lottery and tombola both are nouns.

Word	Noun	Adjective	Verb	Adverb
lottery	Yes	No	No	No
tombola	Yes	No	No	No

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

lottery: players buy (or are given) chances and prizes are distributed by casting lots
tombola: a lottery in which tickets are drawn from a revolving drum

Other hyponyms of lottery include lucky dip, numbers, numbers game, numbers pool, numbers racket, raffle, sweepstakes.

lottery (noun)	tombola (noun)
players buy (or are given) chances and prizes are distributed by casting lots	a lottery in which tickets are drawn from a revolving drum
something that is regarded as a chance event