lowlife vs so-and-so

lowlife and so-and-so both are nouns.

Word	Noun	Adjective	Verb	Adverb
lowlife	Yes	No	No	No
so-and-so	Yes	No	No	No

As nouns, lowlife and so-and-so are synonyms defined as:

lowlife and so-and-so: a person who is deemed to be despicable or contemptible

Other synonyms of lowlife include bum, crumb, dirty dog, git, puke, rat, rotter, scum bag, scumbag, skunk, stinker, stinkpot.

lowlife (noun)	so-and-so (noun)
a person who is deemed to be despicable or contemptible	a person who is deemed to be despicable or contemptible