miasma vs miasm

miasma and miasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
miasma	Yes	No	No	No
miasm	Yes	No	No	No

As nouns, miasma and miasm are synonyms defined as:

miasma and miasm: unhealthy vapors rising from the ground or other sources

As nouns, miasma and miasm are synonyms defined as:

miasma (noun)	miasm (noun)
unhealthy vapors rising from the ground or other sources	unhealthy vapors rising from the ground or other sources
an unwholesome atmosphere	an unwholesome atmosphere