branchlet vs withy

branchlet and withy both are nouns.

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

As nouns, withy is a hyponym of branchlet; that is, withy is a word with a more specific, narrower meaning than branchlet:

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

Other hyponyms of branchlet include brier, wand, withe.

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