rachis vs chine

rachis and chine both are nouns.

Word	Noun	Adjective	Verb	Adverb
rachis	Yes	No	No	No
chine	Yes	No	Yes	No

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

rachis: the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
chine: backbone of an animal

Other hyponyms of rachis include notochord.

rachis (noun)	chine (noun)
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord	backbone of an animal
axis of a compound leaf or compound inflorescence	cut of meat or fish including at least part of the backbone

rachis (verb)	chine (verb)
	cut through the backbone of an animal