shop boy vs boy

shop boy and boy both are nouns.

Word	Noun	Adjective	Verb	Adverb
shop boy	Yes	No	No	No
boy	Yes	No	No	No

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

Other hypernyms of shop boy include male child, clerk, salesclerk, shop assistant, shop clerk.

shop boy (noun)	boy (noun)
a young male shop assistant	a youthful male person
	(ethnic slur) offensive and disparaging term for Black man
	a friendly informal reference to a grown man
	a male human offspring