whorl vs verticil

whorl and verticil both are nouns.

Word	Noun	Adjective	Verb	Adverb
whorl	Yes	No	No	No
verticil	Yes	No	No	No

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

whorl: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
verticil: a whorl of leaves growing around a stem

Other hyponyms of whorl include corolla, calyx.

whorl (noun)	verticil (noun)
a structure consisting of something wound in a continuous series of loops	a whorl of leaves growing around a stem
lock of hair in the shape of a spiral or curl
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)