segmented vs segmental

segmented and segmental both are adjectives.

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

As adjectives, segmented and segmental are synonyms defined as:

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

Other synonyms of segmented include metameric.

segmented (adjective)	segmental (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