weed vs weedy

weed is a noun but weedy is not a noun.

Word	Noun	Adjective	Verb	Adverb
weed	Yes	No	Yes	No
weedy	No	Yes	No	No

weed (noun)	weedy (noun)
street names for marijuana
a black band worn by a man (on the arm or hat) as a sign of mourning
any plant that crowds out cultivated plants

weed (adjective)	weedy (adjective)
	abounding with or resembling weeds
	being very thin

weed (verb)	weedy (verb)
clear of weeds