thenar vs thenal

thenar is a noun but thenal is not a noun.

Word	Noun	Adjective	Verb	Adverb
thenar	Yes	Yes	No	No
thenal	No	Yes	No	No

As adjectives, thenar and thenal are synonyms defined as:

thenar and thenal: of or relating to the palm of the hand or to the area at the base of the thumb

thenar (noun)	thenal (noun)
the inner surface of the hand from the wrist to the base of the fingers
the fleshy area of the palm at the base of the thumb

thenar (adjective)	thenal (adjective)
of or relating to the palm of the hand or to the area at the base of the thumb	of or relating to the palm of the hand or to the area at the base of the thumb