surveyor's instrument vs surveying instrument

surveyor's instrument and surveying instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
surveyor's instrument	Yes	No	No	No
surveying instrument	Yes	No	No	No

As nouns, surveyor's instrument and surveying instrument are synonyms defined as:

surveyor's instrument and surveying instrument: an instrument used by surveyors

surveyor's instrument (noun)	surveying instrument (noun)
an instrument used by surveyors	an instrument used by surveyors