roller coaster vs chute-the-chute

roller coaster and chute-the-chute both are nouns.

Word	Noun	Adjective	Verb	Adverb
roller coaster	Yes	No	No	No
chute-the-chute	Yes	No	No	No

As nouns, roller coaster and chute-the-chute are synonyms defined as:

roller coaster and chute-the-chute: elevated railway in an amusement park (usually with sharp curves and steep inclines)

Other synonyms of roller coaster include big dipper.

roller coaster (noun)	chute-the-chute (noun)
elevated railway in an amusement park (usually with sharp curves and steep inclines)	elevated railway in an amusement park (usually with sharp curves and steep inclines)
anything characterized by abrupt and extreme changes (especially up and down)