smocking vs fancywork

smocking and fancywork both are nouns.

Word	Noun	Adjective	Verb	Adverb
smocking	Yes	No	No	No
fancywork	Yes	No	No	No

As nouns, fancywork is a hypernym of smocking; that is, fancywork is a word with a broader meaning than smocking:

smocking: embroidery consisting of ornamental needlework on a garment that is made by gathering the cloth tightly in stitches
fancywork: decorative needlework

Other hypernyms of smocking include embroidery.

smocking (noun)	fancywork (noun)
embroidery consisting of ornamental needlework on a garment that is made by gathering the cloth tightly in stitches	decorative needlework