knitting stitch vs purl

knitting stitch and purl both are nouns.

Word	Noun	Adjective	Verb	Adverb
knitting stitch	Yes	No	No	No
purl	Yes	No	Yes	No

As nouns, purl is a hyponym of knitting stitch; that is, purl is a word with a more specific, narrower meaning than knitting stitch:

knitting stitch: a stitch taken in knitting
purl: a basic knitting stitch made by putting the needle through the front of the stitch from the righthand side

Other hyponyms of knitting stitch include garter stitch, knit, knit stitch, plain, plain stitch, purl stitch, stockinette stitch.

knitting stitch (noun)	purl (noun)
a stitch taken in knitting	a basic knitting stitch made by putting the needle through the front of the stitch from the righthand side
	gold or silver wire thread

knitting stitch (verb)	purl (verb)
	make a murmuring sound
	embroider with gold or silver thread
	edge or border with gold or silver embroidery
	knit with a purl stitch
	flow in a circular current, of liquids