anchor rope vs anchor chain

anchor rope and anchor chain both are nouns.

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

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

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

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