shop vs machine shop

shop and machine shop both are nouns.

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

As nouns, machine shop is a hyponym of shop; that is, machine shop is a word with a more specific, narrower meaning than shop:

shop (noun)	machine shop (noun)
a course of instruction in a trade (as carpentry or electricity)	workshop where metal is cut and shaped etc., by machine tools
a mercantile establishment for the retail sale of goods or services
small workplace where handcrafts or manufacturing are done

shop (verb)	machine shop (verb)
give away information about somebody
do one's shopping
shop around; not necessarily buying
do one's shopping at; do business with; be a customer or client of