somite vs metamere

somite and metamere both are nouns.

Word	Noun	Adjective	Verb	Adverb
somite	Yes	No	No	No
metamere	Yes	No	No	No

As nouns, somite and metamere are synonyms defined as:

somite and metamere: one of a series of similar body segments into which some animals are divided longitudinally

somite (noun)	metamere (noun)
one of a series of similar body segments into which some animals are divided longitudinally	one of a series of similar body segments into which some animals are divided longitudinally