closed-chain vs closed-ring

closed-chain and closed-ring both are adjectives.

Word	Noun	Adjective	Verb	Adverb
closed-chain	No	Yes	No	No
closed-ring	No	Yes	No	No

As adjectives, closed-chain and closed-ring are synonyms defined as:

closed-chain and closed-ring: having atoms linked by bonds represented in circular or triangular form

closed-chain (adjective)	closed-ring (adjective)
having atoms linked by bonds represented in circular or triangular form	having atoms linked by bonds represented in circular or triangular form