bumper car vs Dodgem

bumper car and Dodgem both are nouns.

Word	Noun	Adjective	Verb	Adverb
bumper car	Yes	No	No	No
Dodgem	Yes	No	No	No

As nouns, bumper car and Dodgem are synonyms defined as:

bumper car and Dodgem: a small low-powered electrically powered vehicle driven on a special platform where there are many others to be dodged

bumper car (noun)	Dodgem (noun)
a small low-powered electrically powered vehicle driven on a special platform where there are many others to be dodged	a small low-powered electrically powered vehicle driven on a special platform where there are many others to be dodged