plant food vs fertilizer

plant food and fertilizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
plant food	Yes	No	No	No
fertilizer	Yes	No	No	No

As nouns, plant food and fertilizer are synonyms defined as:

plant food and fertilizer: any substance such as manure or a mixture of nitrates used to make soil more fertile

Other synonyms of plant food include fertiliser.

plant food (noun)	fertilizer (noun)
any substance such as manure or a mixture of nitrates used to make soil more fertile	any substance such as manure or a mixture of nitrates used to make soil more fertile