stumblebum vs oaf

stumblebum and oaf both are nouns.

Word	Noun	Adjective	Verb	Adverb
stumblebum	Yes	No	No	No
oaf	Yes	No	No	No

As nouns, stumblebum and oaf are synonyms defined as:

Other synonyms of stumblebum include clod, gawk, goon, lout, lubber, lummox, lump.

stumblebum (noun)	oaf (noun)
an awkward stupid person	an awkward stupid person
a second-rate prize fighter