collision vs difference

collision and difference both are nouns.

Word	Noun	Adjective	Verb	Adverb
collision	Yes	No	No	No
difference	Yes	No	No	No

As nouns, difference is a hypernym of collision; that is, difference is a word with a broader meaning than collision:

Other hypernyms of collision include conflict, difference of opinion, dispute.

collision (noun)	difference (noun)
a conflict of opposed ideas or attitudes or goals	the quality of being unlike or dissimilar
an accident resulting from violent impact of a moving object	a disagreement or argument about something important
(physics) a brief event in which two or more bodies come together	a variation that deviates from the standard or norm
	the number that remains after subtraction; the number that when added to the subtrahend gives the minuend
	a significant change