lubber vs stumblebum

lubber and stumblebum both are nouns.

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

As nouns, lubber and stumblebum are synonyms defined as:

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

lubber (noun)	stumblebum (noun)
an awkward stupid person	an awkward stupid person
an inexperienced sailor; a sailor on the first voyage	a second-rate prize fighter