pressure-feed lubricating system vs pressure feed

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

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

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

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

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

pressure-feed lubricating system (noun)	pressure feed (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