twig vs withy

twig and withy both are nouns.

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

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

twig: 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 twig include brier, wand, withe.

twig (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

twig (verb)	withy (verb)
branch out in a twiglike manner
understand, usually after some initial difficulty