brooklime vs marsh plant

brooklime and marsh plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
brooklime	Yes	No	No	No
marsh plant	Yes	No	No	No

As nouns, marsh plant is a hypernym of brooklime; that is, marsh plant is a word with a broader meaning than brooklime:

brooklime: plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers
marsh plant: a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath

Other hypernyms of brooklime include bog plant, swamp plant.

As nouns, marsh plant is a hypernym of brooklime; that is, marsh plant is a word with a broader meaning than brooklime:

brooklime: European plant having low-lying stems with blue flowers; sparsely naturalized in North America
marsh plant: a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath

Other hypernyms of brooklime include bog plant, swamp plant.

brooklime (noun)	marsh plant (noun)
plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers	a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath
European plant having low-lying stems with blue flowers; sparsely naturalized in North America