sandbag vs understate

sandbag is a noun but understate is not a noun.

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

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

sandbag (verb)	understate (verb)
protect or strengthen with sandbags; stop up	represent as less significant or important
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
treat harshly or unfairly
compel by coercion, threats, or crude means