merry-go-round vs carousel

merry-go-round and carousel both are nouns.

Word	Noun	Adjective	Verb	Adverb
merry-go-round	Yes	No	No	No
carousel	Yes	No	No	No

As nouns, merry-go-round and carousel are synonyms defined as:

merry-go-round and carousel: a large, rotating machine with seats for children to ride on for amusement

Other synonyms of merry-go-round include carrousel, roundabout, whirligig.

merry-go-round (noun)	carousel (noun)
a large, rotating machine with seats for children to ride on for amusement	a large, rotating machine with seats for children to ride on for amusement
a never-ending cycle of activities and events (especially when they seem to have little purpose)	a conveyer belt that carries luggage to be claimed by air travelers