lottery vs accident

lottery and accident both are nouns.

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

As nouns, accident is a hypernym of lottery; that is, accident is a word with a broader meaning than lottery:

lottery: something that is regarded as a chance event
accident: anything that happens suddenly or by chance without an apparent cause

Other hypernyms of lottery include chance event, fortuity, stroke.

lottery (noun)	accident (noun)
players buy (or are given) chances and prizes are distributed by casting lots	anything that happens suddenly or by chance without an apparent cause
something that is regarded as a chance event	an unfortunate mishap; especially one causing damage or injury