guarantor vs sponsor

guarantor and sponsor both are nouns.

Word	Noun	Adjective	Verb	Adverb
guarantor	Yes	No	No	No
sponsor	Yes	No	Yes	No

As nouns, sponsor is a hypernym of guarantor; that is, sponsor is a word with a broader meaning than guarantor:

Other hypernyms of guarantor include patron, supporter.

guarantor (noun)	sponsor (noun)
one who provides a warrant or guarantee to another	someone who supports or champions something
	an advocate who presents a person (as for an award or a degree or an introduction etc.)

guarantor (verb)	sponsor (verb)
	assume sponsorship of
	assume responsibility for or leadership of
	do one's shopping at; do business with; be a customer or client of