garner vs summon

garner is a noun but summon is not a noun.

Word	Noun	Adjective	Verb	Adverb
garner	Yes	No	Yes	No
summon	No	No	Yes	No

As verbs, summon is a hyponym of garner; that is, summon is a word with a more specific, narrower meaning than garner:

garner (noun)	summon (noun)
a storehouse for threshed grain or animal feed

garner (verb)	summon (verb)
assemble or get together	make ready for action or use
store grain	call in an official matter, such as to attend court
acquire or deserve by one's efforts or actions	ask to come
	gather or bring together
	cause to become available for use, either literally or figuratively