sandbag vs stun

sandbag is a noun but stun is not a noun.

Word	Noun	Adjective	Verb	Adverb
sandbag	Yes	No	Yes	No
stun	No	No	Yes	No

As verbs, sandbag and stun are synonyms defined as:

sandbag (noun)	stun (noun)
a bag filled with sand; used as a weapon or to build walls or as ballast

sandbag (verb)	stun (verb)
protect or strengthen with sandbags; stop up	make senseless or dizzy by or as if by a blow
downplay one's ability (towards others) in a game in order to deceive, as in gambling	hit something or somebody as if with a sandbag
hit something or somebody as if with a sandbag	overcome as with astonishment or disbelief
treat harshly or unfairly
compel by coercion, threats, or crude means