shop girl vs miss

shop girl and miss both are nouns.

Word	Noun	Adjective	Verb	Adverb
shop girl	Yes	No	No	No
miss	Yes	No	Yes	No

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

Other hypernyms of shop girl include fille, girl, missy, young lady, young woman, clerk, salesclerk, shop assistant, shop clerk.

shop girl (noun)	miss (noun)
a young female shop assistant	a failure to hit (or meet or find etc)
	a young female

shop girl (verb)	miss (verb)
	leave undone or leave out
	fail to experience
	fail to reach
	feel or suffer from the lack of
	fail to reach or get to
	fail to perceive or to catch with the senses or the mind
	be without
	fail to attend an event or activity
	be absent