lat vs striated muscle

lat and striated muscle both are nouns.

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

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

lat: a broad flat muscle on either side of the back
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 lat include skeletal muscle.

lat (noun)	striated muscle (noun)
a broad flat muscle on either side of the back	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