assurance vs warranty

assurance and warranty both are nouns.

Word	Noun	Adjective	Verb	Adverb
assurance	Yes	No	No	No
warranty	Yes	No	No	No

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

assurance: a binding commitment to do or give or refrain from something
warranty: a written assurance that some product or service will be provided or will meet certain specifications

Other hyponyms of assurance include guarantee, warrant, warrantee, guarantee, plight, troth, vow.

assurance (noun)	warranty (noun)
freedom from doubt; belief in yourself and your abilities	a written assurance that some product or service will be provided or will meet certain specifications
a statement intended to inspire confidence
a binding commitment to do or give or refrain from something
a British term for some kinds of insurance