by-blow vs whoreson

by-blow and whoreson both are nouns.

Word	Noun	Adjective	Verb	Adverb
by-blow	Yes	No	No	No
whoreson	Yes	No	No	No

As nouns, by-blow and whoreson are synonyms defined as:

Other synonyms of by-blow include bastard, illegitimate, illegitimate child, love child.

by-blow (noun)	whoreson (noun)
the illegitimate offspring of unmarried parents	the illegitimate offspring of unmarried parents
	insulting terms of address for people who are stupid or irritating or ridiculous