beggar's lice vs stickweed

beggar's lice and stickweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
beggar's lice	Yes	No	No	No
stickweed	Yes	No	No	No

As nouns, stickweed is a hypernym of beggar's lice; that is, stickweed is a word with a broader meaning than beggar's lice:

beggar's lice: Eurasian and North American plants having small prickly nutlets that stick to clothing
stickweed: any of several herbaceous plants having seeds that cling to clothing

beggar's lice (noun)	stickweed (noun)
Eurasian and North American plants having small prickly nutlets that stick to clothing	any of several herbaceous plants having seeds that cling to clothing
any of various tropical and subtropical plants having trifoliate leaves and rough sticky pod sections or loments