milk tooth vs baby tooth

milk tooth and baby tooth both are nouns.

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

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

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

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

milk tooth (noun)	baby 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)