mastoid process vs mastoid

mastoid process and mastoid both are nouns.

Word	Noun	Adjective	Verb	Adverb
mastoid process	Yes	No	No	No
mastoid	Yes	Yes	No	No

As nouns, mastoid process and mastoid are synonyms defined as:

mastoid process and mastoid: process of the temporal bone behind the ear at the base of the skull

Other synonyms of mastoid process include mastoid bone, mastoidal.

mastoid process (noun)	mastoid (noun)
process of the temporal bone behind the ear at the base of the skull	process of the temporal bone behind the ear at the base of the skull

mastoid process (adjective)	mastoid (adjective)
	relating to or resembling a nipple
	of or relating to or in the region of the mastoid process