milk tooth vs deciduous tooth

milk tooth and deciduous tooth both are nouns.

Word	Noun	Adjective	Verb	Adverb
milk tooth	Yes	No	No	No
deciduous tooth	Yes	No	No	No

As nouns, milk tooth and deciduous tooth are synonyms defined as:

milk tooth and deciduous tooth: one of the first temporary teeth of a young mammal (one of 20 in children)

Other synonyms of milk tooth include baby tooth, primary tooth.

milk tooth (noun)	deciduous tooth (noun)
one of the first temporary teeth of a young mammal (one of 20 in children)	one of the first temporary teeth of a young mammal (one of 20 in children)