environs vs medium

environs and medium both are nouns.

Word	Noun	Adjective	Verb	Adverb
environs	Yes	No	No	No
medium	Yes	Yes	No	No

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

Other hyponyms of environs include ambiance, ambience, scene, setting, element, habitat, home ground, melting pot, parts.

environs (noun)	medium (noun)
the area in which something exists or lives	an occupation for which you are especially well suited
an outer adjacent area of any place	an intervening substance through which signals can travel as a means for communication
	a means or instrumentality for storing or communicating information
	(usually plural) transmissions that are disseminated widely to the public
	the surrounding environment
	someone who serves as an intermediary between the living and the dead
	a state that is intermediate between extremes; a middle position
	(bacteriology) a nutrient substance (solid or liquid) that is used to cultivate micro-organisms
	(biology) a substance in which specimens are preserved or displayed
	a liquid with which pigment is mixed by a painter
	an intervening substance through which something is achieved

environs (adjective)	medium (adjective)
	(meat) cooked until there is just a little pink meat inside
	around the middle of a scale of evaluation