dog tag vs tag

dog tag and tag both are nouns.

Word	Noun	Adjective	Verb	Adverb
dog tag	Yes	No	No	No
tag	Yes	No	Yes	No

As nouns, tag is a hypernym of dog tag; that is, tag is a word with a broader meaning than dog tag:

dog tag: metal plate on a dog collar bearing its registration number
tag: a label written or printed on paper, cardboard, or plastic that is attached to something to indicate its owner, nature, price, etc.

Other hypernyms of dog tag include ticket.

As nouns, tag is a hypernym of dog tag; that is, tag is a word with a broader meaning than dog tag:

dog tag: military identification tag worn on a chain around the neck
tag: a label written or printed on paper, cardboard, or plastic that is attached to something to indicate its owner, nature, price, etc.

Other hypernyms of dog tag include ticket.

dog tag (noun)	tag (noun)
metal plate on a dog collar bearing its registration number	(sports) the act of touching a player in a game (which changes their status in the game)
military identification tag worn on a chain around the neck	a game in which one child chases the others; the one who is caught becomes the next chaser
	a small piece of cloth
	a label written or printed on paper, cardboard, or plastic that is attached to something to indicate its owner, nature, price, etc.
	a label associated with something for the purpose of identification

dog tag (verb)	tag (verb)
	provide with a name or nickname
	attach a tag or label to
	touch a player while he is holding the ball
	supply (blank verse or prose) with rhymes
	go after with the intent to catch