tricycle vs trike

tricycle and trike both are nouns.

Word	Noun	Adjective	Verb	Adverb
tricycle	Yes	No	No	No
trike	Yes	No	No	No

As nouns, tricycle and trike are synonyms defined as:

tricycle and trike: a vehicle with three wheels that is moved by foot pedals

Other synonyms of tricycle include velocipede.

tricycle (noun)	trike (noun)
a vehicle with three wheels that is moved by foot pedals	a vehicle with three wheels that is moved by foot pedals