serratus vs striated muscle

serratus and striated muscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
serratus	Yes	No	No	No
striated muscle	Yes	No	No	No

As nouns, striated muscle is a hypernym of serratus; that is, striated muscle is a word with a broader meaning than serratus:

serratus: any of several muscles of the trunk
striated muscle: a muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes

Other hypernyms of serratus include skeletal muscle.

serratus (noun)	striated muscle (noun)
any of several muscles of the trunk	a muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes