some vs close to

some is an adjective but close to is not an adjective.

Word	Noun	Adjective	Verb	Adverb
some	No	Yes	No	Yes
close to	No	No	No	Yes

As adverbs, some and close to are synonyms defined as:

some and close to: (of quantities) imprecise but fairly close to correct

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

some (adjective)	close to (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

some (adverb)	close to (adverb)
(of quantities) imprecise but fairly close to correct	(of quantities) imprecise but fairly close to correct