production vs byproduct

production and byproduct both are nouns.

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

As nouns, byproduct is a hyponym of production; that is, byproduct is a word with a more specific, narrower meaning than production:

production (noun)	byproduct (noun)
the act or process of producing something	a product made during the manufacture of something else
(law) the act of exhibiting in a court of law	a secondary and sometimes unexpected consequence
(economics) manufacturing or mining or growing something (usually in large quantities) for sale
the creation of value or wealth by producing goods and services
an artifact that has been created by someone or some process
a presentation for the stage or screen or radio or television
a display that is exaggerated or unduly complicated
the quantity of something (as a commodity) that is created (usually within a given period of time)