string out vs spread out

string out and spread out both are verbs.

Word	Noun	Adjective	Verb	Adverb
string out	No	No	Yes	No
spread out	No	No	Yes	No

As verbs, string out and spread out are synonyms defined as:

string out and spread out: set out or stretch in a line, succession, or series

string out (verb)	spread out (verb)
set out or stretch in a line, succession, or series	set out or stretch in a line, succession, or series
	spread out or open from a closed or folded state
	move outward
	extend in one or more directions
	move away from each other
	turn outward
	strew or distribute over an area