force feed vs lubricating system

force feed and lubricating system both are nouns.

Word	Noun	Adjective	Verb	Adverb
force feed	Yes	No	No	No
lubricating system	Yes	No	No	No

As nouns, force feed and lubricating system are synonyms defined as:

force feed and lubricating system: mechanical system of lubricating internal combustion engines in which a pump forces oil into the engine bearings

force feed (noun)	lubricating system (noun)
mechanical system of lubricating internal combustion engines in which a pump forces oil into the engine bearings	mechanical system of lubricating internal combustion engines in which a pump forces oil into the engine bearings