shop boy vs salesclerk

shop boy and salesclerk both are nouns.

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

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

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

shop boy (noun)	salesclerk (noun)
a young male shop assistant	a salesperson in a store