segment vs sarcomere

segment and sarcomere both are nouns.

Word	Noun	Adjective	Verb	Adverb
segment	Yes	No	Yes	No
sarcomere	Yes	No	No	No

As nouns, sarcomere is a hyponym of segment; that is, sarcomere is a word with a more specific, narrower meaning than segment:

Other hyponyms of segment include metamere, somite, section, internode.

segment (noun)	sarcomere (noun)
one of several parts or pieces that fit with others to constitute a whole object	one of the segments into which a myofibril is divided
one of the parts into which something naturally divides

segment (verb)	sarcomere (verb)
divide into segments
divide or split up