planetoid vs minor planet

planetoid and minor planet both are nouns.

Word	Noun	Adjective	Verb	Adverb
planetoid	Yes	No	No	No
minor planet	Yes	No	No	No

As nouns, planetoid and minor planet are synonyms defined as:

planetoid and minor planet: any of numerous small celestial bodies that move around the sun

planetoid (noun)	minor planet (noun)
any of numerous small celestial bodies that move around the sun	any of numerous small celestial bodies that move around the sun