As nouns the difference between pysma and xysma
is that pysma is (rhetoric) the asking of a series of questions requiring complex answers while xysma is material resembling bits of membrane in stools of diarrhea.
pysma
English
Noun
(rhetoric) The asking of a series of questions requiring complex answers. xysma
English
Noun
material resembling bits of membrane in stools of diarrhea.
References
The American Heritage Medical Dictionary