force feed vs pressure-feed lubricating system

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

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

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

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

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

force feed (noun)	pressure-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