crochet vs shell stitch

crochet and shell stitch both are nouns.

Word	Noun	Adjective	Verb	Adverb
crochet	Yes	No	Yes	No
shell stitch	Yes	No	Yes	No

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

Other hyponyms of crochet include double crochet, double stitch, single crochet, single stitch.

crochet (noun)	shell stitch (noun)
needlework done by interlocking looped stitches with a hooked needle	a crochet stitch, also known as a fan stitch

crochet (verb)	shell stitch (verb)
make a piece of needlework by interlocking and looping thread with a hooked needle	make by shell stitching
create by looping or crocheting