wickerwork vs piece of work

wickerwork and piece of work both are nouns.

Word	Noun	Adjective	Verb	Adverb
wickerwork	Yes	No	No	No
piece of work	Yes	No	No	No

As nouns, piece of work is a hypernym of wickerwork; that is, piece of work is a word with a broader meaning than wickerwork:

wickerwork: work made of interlaced slender branches (especially willow branches)
piece of work: a product produced or accomplished through the effort or activity or agency of a person or thing

Other hypernyms of wickerwork include work.

wickerwork (noun)	piece of work (noun)
work made of interlaced slender branches (especially willow branches)	a product produced or accomplished through the effort or activity or agency of a person or thing