flame cell vs urinary organ

flame cell and urinary organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
flame cell	Yes	No	No	No
urinary organ	Yes	No	No	No

As nouns, urinary organ is a hypernym of flame cell; that is, urinary organ is a word with a broader meaning than flame cell:

flame cell: organ of excretion in flatworms
urinary organ: an organ that separates waste substances from the blood and discharges them

Other hypernyms of flame cell include excretory organ.

flame cell (noun)	urinary organ (noun)
organ of excretion in flatworms	an organ that separates waste substances from the blood and discharges them