run up vs stitch

run up is not a noun while stitch is a noun.

Word	Noun	Adjective	Verb	Adverb
run up	No	No	Yes	No
stitch	Yes	No	Yes	No

As verbs, run up and stitch are synonyms defined as:

Other synonyms of run up include sew, sew together.

run up (noun)	stitch (noun)
	a link or loop or knot made by an implement in knitting, crocheting, embroidery, or sewing
	a sharp spasm of pain in the side resulting from running

run up (verb)	stitch (verb)
pile up (debts or scores)	fasten by sewing; do needlework
raise by using ropes and pulleys
fasten by sewing; do needlework
make by sewing together quickly
accumulate, sometimes as a debt