acromial process vs acromion

acromial process and acromion both are nouns.

Word	Noun	Adjective	Verb	Adverb
acromial process	Yes	No	No	No
acromion	Yes	No	No	No

As nouns, acromial process and acromion are synonyms defined as:

acromial process and acromion: the outermost point of the spine of the shoulder blade

acromial process (noun)	acromion (noun)
the outermost point of the spine of the shoulder blade	the outermost point of the spine of the shoulder blade