rhomboid muscle vs rhomboid

rhomboid muscle and rhomboid both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhomboid muscle	Yes	No	No	No
rhomboid	Yes	Yes	No	No

As nouns, rhomboid muscle and rhomboid are synonyms defined as:

rhomboid muscle and rhomboid: any of several muscles of the upper back that help move the shoulder blade

rhomboid muscle (noun)	rhomboid (noun)
any of several muscles of the upper back that help move the shoulder blade	any of several muscles of the upper back that help move the shoulder blade
	a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal

rhomboid muscle (adjective)	rhomboid (adjective)
	shaped like a rhombus or rhomboid