segmental vs segmented

segmental and segmented both are adjectives.

Word	Noun	Adjective	Verb	Adverb
segmental	No	Yes	No	No
segmented	No	Yes	No	No

As adjectives, segmental and segmented are synonyms defined as:

segmental and segmented: having the body divided into successive metameres or segments, as in earthworms or lobsters

Other synonyms of segmental include metameric.

segmental (adjective)	segmented (adjective)
having the body divided into successive metameres or segments, as in earthworms or lobsters	having the body divided into successive metameres or segments, as in earthworms or lobsters
divided or organized into speech segments or isolable speech sounds