lock ring vs lock washer

lock ring and lock washer both are nouns.

Word	Noun	Adjective	Verb	Adverb
lock ring	Yes	No	No	No
lock washer	Yes	No	No	No

As nouns, lock ring and lock washer are synonyms defined as:

Other synonyms of lock ring include lockring.

lock ring (noun)	lock washer (noun)
washer that prevents a nut from loosening	washer that prevents a nut from loosening