meadow saxifrage vs rockfoil

meadow saxifrage and rockfoil both are nouns.

Word	Noun	Adjective	Verb	Adverb
meadow saxifrage	Yes	No	No	No
rockfoil	Yes	No	No	No

As nouns, rockfoil is a hypernym of meadow saxifrage; that is, rockfoil is a word with a broader meaning than meadow saxifrage:

meadow saxifrage: rosette-forming perennial having compact panicles of white flowers; Europe
rockfoil: any of various plants of the genus Saxifraga

Other hypernyms of meadow saxifrage include breakstone, saxifrage.

meadow saxifrage (noun)	rockfoil (noun)
rosette-forming perennial having compact panicles of white flowers; Europe	any of various plants of the genus Saxifraga