manufacturing plant vs factory

manufacturing plant and factory both are nouns.

Word	Noun	Adjective	Verb	Adverb
manufacturing plant	Yes	No	No	No
factory	Yes	No	No	No

As nouns, manufacturing plant and factory are synonyms defined as:

manufacturing plant and factory: a plant consisting of one or more buildings with facilities for manufacturing

Other synonyms of manufacturing plant include manufactory, mill.

manufacturing plant (noun)	factory (noun)
a plant consisting of one or more buildings with facilities for manufacturing	a plant consisting of one or more buildings with facilities for manufacturing