coder vs gamedev

coder and gamedev both are nouns.

Word	Noun	Adjective	Verb	Adverb
coder	Yes	No	No	No
gamedev	Yes	No	No	No

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

Other hyponyms of coder include cracker, hacker, cyber-terrorist, cyberpunk.

coder (noun)	gamedev (noun)
a person who designs and writes and tests computer programs	someone who develops a game