clerk vs shop clerk

clerk and shop clerk both are nouns.

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

As nouns, clerk and shop clerk are synonyms defined as:

Other synonyms of clerk include salesclerk, shop assistant.

clerk (noun)	shop clerk (noun)
an employee who performs clerical work (e.g., keeps records or accounts)	a salesperson in a store
a salesperson in a store

clerk (verb)	shop clerk (verb)
work as a clerk, as in the legal business