bird shot vs duck shot

bird shot and duck shot both are nouns.

Word	Noun	Adjective	Verb	Adverb
bird shot	Yes	No	No	No
duck shot	Yes	No	No	No

As nouns, bird shot and duck shot are synonyms defined as:

Other synonyms of bird shot include buckshot.

bird shot (noun)	duck shot (noun)
small lead shot for shotgun shells	small lead shot for shotgun shells