knitter vs needleworker

knitter and needleworker both are nouns.

Word	Noun	Adjective	Verb	Adverb
knitter	Yes	No	No	No
needleworker	Yes	No	No	No

As nouns, needleworker is a hypernym of knitter; that is, needleworker is a word with a broader meaning than knitter:

knitter: someone who makes garments (or fabrics) by intertwining yarn or thread
needleworker: someone who does work (as sewing or embroidery) with a needle

knitter (noun)	needleworker (noun)
someone who makes garments (or fabrics) by intertwining yarn or thread	someone who does work (as sewing or embroidery) with a needle