deltoid muscle vs musculus deltoideus

deltoid muscle and musculus deltoideus both are nouns.

Word	Noun	Adjective	Verb	Adverb
deltoid muscle	Yes	No	No	No
musculus deltoideus	Yes	No	No	No

As nouns, deltoid muscle and musculus deltoideus are synonyms defined as:

deltoid muscle and musculus deltoideus: a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm

Other synonyms of deltoid muscle include deltoid.

deltoid muscle (noun)	musculus deltoideus (noun)
a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm	a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm