stitch vs backstitch

stitch and backstitch both are nouns.

Word	Noun	Adjective	Verb	Adverb
stitch	Yes	No	Yes	No
backstitch	Yes	No	Yes	No

As verbs, backstitch is a hyponym of stitch; that is, backstitch is a word with a more specific, narrower meaning than stitch:

stitch (noun)	backstitch (noun)
a link or loop or knot made by an implement in knitting, crocheting, embroidery, or sewing	an overlapping stitch made by starting the next stitch at the middle of the preceding one
a sharp spasm of pain in the side resulting from running

stitch (verb)	backstitch (verb)
fasten by sewing; do needlework	do backstitches