Pluto vs solar system

Pluto and solar system both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pluto	Yes	No	No	No
solar system	Yes	No	No	No

Pluto (noun)	solar system (noun)
a large asteroid that was once thought to be the farthest known planet from the sun; it has an elliptical orbit	the sun with the celestial bodies that revolve around it in its gravitational field
(Roman mythology) god of the underworld; counterpart of Greek Hades
a cartoon character created by Walt Disney, a red-colored, medium-sized, short-haired dog with black ears