physical pendulum vs compound pendulum

physical pendulum and compound pendulum both are nouns.

Word	Noun	Adjective	Verb	Adverb
physical pendulum	Yes	No	No	No
compound pendulum	Yes	No	No	No

As nouns, physical pendulum and compound pendulum are synonyms defined as:

physical pendulum and compound pendulum: pendulum consisting of an actual object allowed to rotate freely around a horizontal axis

physical pendulum (noun)	compound pendulum (noun)
pendulum consisting of an actual object allowed to rotate freely around a horizontal axis	pendulum consisting of an actual object allowed to rotate freely around a horizontal axis