extremity vs chela

extremity and chela both are nouns.

Word	Noun	Adjective	Verb	Adverb
extremity	Yes	No	No	No
chela	Yes	No	No	No

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

Other hyponyms of extremity include chelicera, mouthpart, fang, claw, nipper, pincer, parapodium, fin, pleopod, swimmeret, limb, dactyl, digit.

extremity (noun)	chela (noun)
an external body part that projects from the body	a Hindu disciple of a swami
that part of a limb that is farthest from the torso	a grasping structure on the limb of a crustacean or other arthropods
the outermost or farthest region or point
the greatest or utmost degree
an extreme condition or state (especially of adversity or disease)