food cycle vs food chain

food cycle and food chain both are nouns.

Word	Noun	Adjective	Verb	Adverb
food cycle	Yes	No	No	No
food chain	Yes	No	No	No

food cycle (noun)	food chain (noun)
(ecology) a community of organisms where there are several interrelated food chains	(ecology) a community of organisms where each member is eaten in turn by another member