sponsor vs angel

sponsor and angel both are nouns.

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

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

sponsor (noun)	angel (noun)
someone who supports or champions something	spiritual being attendant upon God
an advocate who presents a person (as for an award or a degree or an introduction etc.)	someone who provides financial support for some venture
	person of exceptional holiness

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