summon vs summoning

summon is not a noun while summoning is a noun.

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

summon (noun)	summoning (noun)
	calling up supposed supernatural forces by spells and incantations

summon (verb)	summoning (verb)
make ready for action or use
call in an official matter, such as to attend court
ask to come
gather or bring together
cause to become available for use, either literally or figuratively