binder vs ring-binder

binder and ring-binder both are nouns.

Word	Noun	Adjective	Verb	Adverb
binder	Yes	No	No	No
ring-binder	Yes	No	No	No

As nouns, binder and ring-binder are synonyms defined as:

binder (noun)	ring-binder (noun)
something used to tie or bind	holds loose papers or magazines
holds loose papers or magazines
a machine that cuts grain and binds it in sheaves
something used to bind separate particles together or facilitate adhesion to a surface