close to vs more or less

close to and more or less both are adverbs.

Word	Noun	Adjective	Verb	Adverb
close to	No	No	No	Yes
more or less	No	No	No	Yes

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

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

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

close to (adverb)	more or less (adverb)
(of quantities) imprecise but fairly close to correct	(of quantities) imprecise but fairly close to correct
	to a small degree or extent