sphenoid vs sphenoid bone

sphenoid and sphenoid bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
sphenoid	Yes	No	No	No
sphenoid bone	Yes	No	No	No

As nouns, sphenoid and sphenoid bone are synonyms defined as:

sphenoid and sphenoid bone: butterfly-shaped bone at the base of the skull

Other synonyms of sphenoid include os sphenoidale.

sphenoid (noun)	sphenoid bone (noun)
butterfly-shaped bone at the base of the skull	butterfly-shaped bone at the base of the skull