sprocket vs sprocket wheel

sprocket and sprocket wheel both are nouns.

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

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

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

sprocket (noun)	sprocket wheel (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