auto factory vs manufactory

auto factory and manufactory both are nouns.

Word	Noun	Adjective	Verb	Adverb
auto factory	Yes	No	No	No
manufactory	Yes	No	No	No

As nouns, manufactory is a hypernym of auto factory; that is, manufactory is a word with a broader meaning than auto factory:

auto factory: a factory where automobiles are manufactured
manufactory: a plant consisting of one or more buildings with facilities for manufacturing

Other hypernyms of auto factory include factory, manufacturing plant, mill.

auto factory (noun)	manufactory (noun)
a factory where automobiles are manufactured	a plant consisting of one or more buildings with facilities for manufacturing