silver dollar vs cartwheel

silver dollar and cartwheel both are nouns.

Word	Noun	Adjective	Verb	Adverb
silver dollar	Yes	No	No	No
cartwheel	Yes	No	Yes	No

As nouns, silver dollar and cartwheel are synonyms defined as:

silver dollar (noun)	cartwheel (noun)
southeastern European plant cultivated for its fragrant purplish flowers and round flat papery silver-white seedpods that are used for indoor decoration	acrobatic revolutions with the body turned sideways and the arms and legs outstretched like the spokes of a wheel
a dollar made of silver	a wheel that has wooden spokes and a metal rim
	a dollar made of silver

silver dollar (verb)	cartwheel (verb)
	do cartwheels: perform an acrobatic movement using both hands and feet