up-country vs upcountry

up-country is not an adjective while upcountry is an adjective.

Word	Noun	Adjective	Verb	Adverb
up-country	No	No	No	Yes
upcountry	No	Yes	No	Yes

As adverbs, up-country and upcountry are synonyms defined as:

up-country (adjective)	upcountry (adjective)
	of or coming from the middle of a region or country

up-country (adverb)	upcountry (adverb)
to or in the interior of a country or region	to or in the interior of a country or region