roughly vs more or less

roughly and more or less both are adverbs.

Word	Noun	Adjective	Verb	Adverb
roughly	No	No	No	Yes
more or less	No	No	No	Yes

As adverbs, roughly and more or less are synonyms defined as:

roughly and more or less: (of quantities) imprecise but fairly close to correct

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

roughly (adverb)	more or less (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	to a small degree or extent
with roughness or violence (`rough' is an informal variant for `roughly')