shop clerk vs clerk

shop clerk and clerk both are nouns.

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

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

Other synonyms of shop clerk include salesclerk, shop assistant.

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

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