time and motion study vs time study

time and motion study and time study both are nouns.

Word	Noun	Adjective	Verb	Adverb
time and motion study	Yes	No	No	No
time study	Yes	No	No	No

As nouns, time and motion study and time study are synonyms defined as:

time and motion study and time study: an analysis of a specific job in an effort to find the most efficient method in terms of time and effort

Other synonyms of time and motion study include motion study, time-and-motion study, time-motion study, work study.

time and motion study (noun)	time study (noun)
an analysis of a specific job in an effort to find the most efficient method in terms of time and effort	an analysis of a specific job in an effort to find the most efficient method in terms of time and effort