byproduct vs product

byproduct and product both are nouns.

Word	Noun	Adjective	Verb	Adverb
byproduct	Yes	No	No	No
product	Yes	No	No	No

As nouns, product is a hypernym of byproduct; that is, product is a word with a broader meaning than byproduct:

Other hypernyms of byproduct include production.

byproduct (noun)	product (noun)
a product made during the manufacture of something else	an artifact that has been created by someone or some process
a secondary and sometimes unexpected consequence	items for sale to the individual consumer
	a quantity obtained by multiplication
	the set of elements common to two or more sets
	a consequence of someone's efforts or of a particular set of circumstances
	a chemical substance formed as a result of a chemical reaction