chiasma vs chiasm

chiasma and chiasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
chiasma	Yes	No	No	No
chiasm	Yes	No	No	No

As nouns, chiasma and chiasm are synonyms defined as:

chiasma and chiasm: an intersection or crossing of two tracts in the form of the letter X

Other synonyms of chiasma include decussation.

chiasma (noun)	chiasm (noun)
an intersection or crossing of two tracts in the form of the letter X	an intersection or crossing of two tracts in the form of the letter X