meadow bright vs bog plant

meadow bright and bog plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
meadow bright	Yes	No	No	No
bog plant	Yes	No	No	No

As nouns, bog plant is a hypernym of meadow bright; that is, bog plant is a word with a broader meaning than meadow bright:

meadow bright: swamp plant of Europe and North America having bright yellow flowers resembling buttercups
bog plant: a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath

Other hypernyms of meadow bright include marsh plant, swamp plant.

meadow bright (noun)	bog plant (noun)
swamp plant of Europe and North America having bright yellow flowers resembling buttercups	a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath