fodder vs cannon fodder

fodder and cannon fodder both are nouns.

Word	Noun	Adjective	Verb	Adverb
fodder	Yes	No	Yes	No
cannon fodder	Yes	No	No	No

As nouns, fodder and cannon fodder are synonyms defined as:

fodder and cannon fodder: soldiers who are regarded as expendable in the face of artillery fire

Other synonyms of fodder include fresh fish.

fodder (noun)	cannon fodder (noun)
coarse food (especially for livestock) composed of entire plants or the leaves and stalks of a cereal crop	soldiers who are regarded as expendable in the face of artillery fire
soldiers who are regarded as expendable in the face of artillery fire

fodder (verb)	cannon fodder (verb)
give fodder (to domesticated animals)