heterotroph vs organism

heterotroph and organism both are nouns.

Word	Noun	Adjective	Verb	Adverb
heterotroph	Yes	No	No	No
organism	Yes	No	No	No

As nouns, organism is a hypernym of heterotroph; that is, organism is a word with a broader meaning than heterotroph:

heterotroph: an organism that depends on complex organic substances for nutrition
organism: a living thing that has (or can develop) the ability to act or function independently

Other hypernyms of heterotroph include being.

heterotroph (noun)	organism (noun)
an organism that depends on complex organic substances for nutrition	a living thing that has (or can develop) the ability to act or function independently
	a system considered analogous in structure or function to a living body