withy vs branchlet

withy and branchlet both are nouns.

Word	Noun	Adjective	Verb	Adverb
withy	Yes	No	No	No
branchlet	Yes	No	No	No

As nouns, branchlet is a hypernym of withy; that is, branchlet is a word with a broader meaning than withy:

withy: strong flexible twig
branchlet: a small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year

Other hypernyms of withy include sprig, twig.

withy (noun)	branchlet (noun)
strong flexible twig	a small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year