trophy vs gold medal

trophy and gold medal both are nouns.

Word	Noun	Adjective	Verb	Adverb
trophy	Yes	No	No	No
gold medal	Yes	No	No	No

As nouns, gold medal is a hyponym of trophy; that is, gold medal is a word with a more specific, narrower meaning than trophy:

trophy: something given as a token of victory
gold medal: a trophy made of gold (or having the appearance of gold) that is usually awarded for winning first place in a competition

Other hyponyms of trophy include apple of discord, booby prize, bronze medal, cup, loving cup, silver, silver medal.

trophy (noun)	gold medal (noun)
something given as a token of victory	a trophy made of gold (or having the appearance of gold) that is usually awarded for winning first place in a competition
an award for success in war or hunting