spring cleavers vs bedstraw

spring cleavers and bedstraw both are nouns.

Word	Noun	Adjective	Verb	Adverb
spring cleavers	Yes	No	No	No
bedstraw	Yes	No	No	No

As nouns, bedstraw is a hypernym of spring cleavers; that is, bedstraw is a word with a broader meaning than spring cleavers:

spring cleavers: annual having the stem beset with curved prickles; North America and Europe and Asia
bedstraw: any of several plants of the genus Galium

spring cleavers (noun)	bedstraw (noun)
annual having the stem beset with curved prickles; North America and Europe and Asia	any of several plants of the genus Galium