approximation vs bringing close together

approximation and bringing close together both are nouns.

Word	Noun	Adjective	Verb	Adverb
approximation	Yes	No	No	No
bringing close together	Yes	No	No	No

As nouns, approximation and bringing close together are synonyms defined as:

approximation and bringing close together: the act of bringing near or bringing together especially the cut edges of tissue

approximation (noun)	bringing close together (noun)
the act of bringing near or bringing together especially the cut edges of tissue	the act of bringing near or bringing together especially the cut edges of tissue
the quality of coming near to identity (especially close in quantity)
an approximate calculation of quantity or degree or worth
an imprecise or incomplete account