May blob vs swamp plant

May blob and swamp plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
May blob	Yes	No	No	No
swamp plant	Yes	No	No	No

As nouns, swamp plant is a hypernym of May blob; that is, swamp plant is a word with a broader meaning than May blob:

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

Other hypernyms of May blob include bog plant, marsh plant.

May blob (noun)	swamp 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