miliaria vs heat rash

miliaria and heat rash both are nouns.

Word	Noun	Adjective	Verb	Adverb
miliaria	Yes	No	No	No
heat rash	Yes	No	No	No

As nouns, miliaria and heat rash are synonyms defined as:

miliaria and heat rash: obstruction of the sweat ducts during high heat and humidity

Other synonyms of miliaria include prickly heat.

miliaria (noun)	heat rash (noun)
obstruction of the sweat ducts during high heat and humidity	obstruction of the sweat ducts during high heat and humidity