sprocket wheel vs sprocket

sprocket wheel and sprocket both are nouns.

Word	Noun	Adjective	Verb	Adverb
sprocket wheel	Yes	No	No	No
sprocket	Yes	No	No	No

As nouns, sprocket wheel and sprocket are synonyms defined as:

sprocket wheel and sprocket: thin wheel with teeth that engage with a chain

sprocket wheel (noun)	sprocket (noun)
thin wheel with teeth that engage with a chain	thin wheel with teeth that engage with a chain
	tooth on the rim of gear wheel
	roller that has teeth on the rims to pull film or paper through