lacing vs shoe string

lacing and shoe string both are nouns.

Word	Noun	Adjective	Verb	Adverb
lacing	Yes	No	No	No
shoe string	Yes	No	No	No

As nouns, shoe string is a hyponym of lacing; that is, shoe string is a word with a more specific, narrower meaning than lacing:

lacing: a cord that is drawn through eyelets or around hooks in order to draw together two edges (as of a shoe or garment)
shoe string: a lace used for fastening shoes

Other hyponyms of lacing include bootlace, shoe lace, shoelace, shoestring.

lacing (noun)	shoe string (noun)
the act of inflicting corporal punishment with repeated blows	a lace used for fastening shoes
a cord that is drawn through eyelets or around hooks in order to draw together two edges (as of a shoe or garment)	a small amount of money
a small amount of liquor added to a food or beverage