honey gland vs plant organ

honey gland and plant organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
honey gland	Yes	No	No	No
plant organ	Yes	No	No	No

As nouns, plant organ is a hypernym of honey gland; that is, plant organ is a word with a broader meaning than honey gland:

honey gland: a gland (often a protuberance or depression) that secretes nectar
plant organ: a functional and structural unit of a plant or fungus

honey gland (noun)	plant organ (noun)
a gland (often a protuberance or depression) that secretes nectar	a functional and structural unit of a plant or fungus