anchor chain vs anchor rope

anchor chain and anchor rope both are nouns.

Word	Noun	Adjective	Verb	Adverb
anchor chain	Yes	No	No	No
anchor rope	Yes	No	No	No

As nouns, anchor chain and anchor rope are synonyms defined as:

anchor chain and anchor rope: the chain or rope that attaches an anchor to a vessel

anchor chain (noun)	anchor rope (noun)
the chain or rope that attaches an anchor to a vessel	the chain or rope that attaches an anchor to a vessel