more or less vs roughly

more or less and roughly both are adverbs.

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

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

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

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

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