carrier vs delivery boy

carrier and delivery boy both are nouns.

Word	Noun	Adjective	Verb	Adverb
carrier	Yes	No	No	No
delivery boy	Yes	No	No	No

As nouns, delivery boy is a hypernym of carrier; that is, delivery boy is a word with a broader meaning than carrier:

Other hypernyms of carrier include deliverer, deliveryman.

As nouns, delivery boy is a hypernym of carrier; that is, delivery boy is a word with a broader meaning than carrier:

Other hypernyms of carrier include deliverer, deliveryman.

carrier (noun)	delivery boy (noun)
(genetics) an organism that possesses a recessive gene whose effect is masked by a dominant allele; the associated trait is not apparent but can be passed on to offspring	someone employed to make deliveries
a large warship that carries planes and has a long flat deck for takeoffs and landings
a rack attached to a vehicle; for carrying luggage or skis or the like
a self-propelled wheeled vehicle designed specifically to carry something
a person or firm in the business of transporting people or goods or messages
(medicine) a person (or animal) who has some pathogen to which he is immune but who can pass it on to others
a boy who delivers newspapers
a man who delivers the mail
someone whose employment involves carrying something
a radio wave that can be modulated in order to transmit a signal
an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reaction