roughly vs some

roughly is not an adjective while some is an adjective.

Word	Noun	Adjective	Verb	Adverb
roughly	No	No	No	Yes
some	No	Yes	No	Yes

As adverbs, roughly and some are synonyms defined as:

Other synonyms of roughly include about, approximately, around, close to, just about, more or less, or so.

roughly (adjective)	some (adjective)
	(quantifier) used with either mass nouns or plural count nouns to indicate an unspecified number or quantity
	remarkable
	relatively many but unspecified in number

roughly (adverb)	some (adverb)
(of quantities) imprecise but fairly close to correct	(of quantities) imprecise but fairly close to correct
with rough motion as over a rough surface
with roughness or violence (`rough' is an informal variant for `roughly')