lubricating system vs force-feed lubricating system

lubricating system and force-feed lubricating system both are nouns.

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

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

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

Other synonyms of lubricating system include force feed, pressure-feed lubricating system, pressure feed.

lubricating system (noun)	force-feed 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