turntable vs lazy Susan

turntable and lazy Susan both are nouns.

Word	Noun	Adjective	Verb	Adverb
turntable	Yes	No	No	No
lazy Susan	Yes	No	No	No

As nouns, turntable and lazy Susan are synonyms defined as:

turntable (noun)	lazy Susan (noun)
a circular horizontal platform that rotates a phonograph record while it is being played	a revolving tray placed on a dining table
a rotatable platform with a track; used to turn locomotives and cars
a revolving tray placed on a dining table