Difference between guarantee and warranty

[Guest]

Test No. incompl/advan-43 "Guarantees and Warranties", question 10

Sometimes you get a one year warranty, a two year one or even a six month one - they all ..........

(a) various
(b) variable
(c) variety
(d) vary

Test No. incompl/advan-43 "Guarantees and Warranties", answer 10

Sometimes you get a one year warranty, a two year one or even a six month one - they all vary.

Correct answer: (d) vary

Your answer was: correct
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Help - with one sentence/explanation - when I am allowed to use "guarentee" and when "warranty"?
Due to these 10 examples I didn't get through completely even got rather confused. Sorry.

[Alan]

Guarantee is the more general of the two words in meaning. It has the sense of assurance both as a noun and a verb.
Warranty is the actual written document that supports the assurance that something will be repaired or replaced without additional cost to the buyer.
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