brewery vs microbrewery

brewery and microbrewery both are nouns.

Word	Noun	Adjective	Verb	Adverb
brewery	Yes	No	No	No
microbrewery	Yes	No	No	No

As nouns, microbrewery is a hyponym of brewery; that is, microbrewery is a word with a more specific, narrower meaning than brewery:

brewery: a plant where beer is brewed by fermentation
microbrewery: a small brewery; consumption of the product is mainly elsewhere

Other hyponyms of brewery include brewpub.

brewery (noun)	microbrewery (noun)
a plant where beer is brewed by fermentation	a small brewery; consumption of the product is mainly elsewhere