stumble vs stagger

stumble and stagger both are nouns.

Word	Noun	Adjective	Verb	Adverb
stumble	Yes	No	Yes	No
stagger	Yes	No	Yes	No

As nouns, stumble and stagger are synonyms defined as:

Other synonyms of stumble include lurch.

stumble (noun)	stagger (noun)
an unsteady uneven gait	an unsteady uneven gait
an unintentional but embarrassing blunder

stumble (verb)	stagger (verb)
make an error	to arrange in a systematic order
miss a step and fall or nearly fall	astound or overwhelm, as with shock
walk unsteadily, tripping repeatedly	walk as if unable to control one's movements
encounter by chance	walk with great difficulty