leishmaniasis vs leishmaniosis

leishmaniasis and leishmaniosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
leishmaniasis	Yes	No	No	No
leishmaniosis	Yes	No	No	No

As nouns, leishmaniasis and leishmaniosis are synonyms defined as:

leishmaniasis and leishmaniosis: sores resulting from a tropical infection by protozoa of the genus Leishmania which are spread by sandflies

Other synonyms of leishmaniasis include kala azar.

leishmaniasis (noun)	leishmaniosis (noun)
sores resulting from a tropical infection by protozoa of the genus Leishmania which are spread by sandflies	sores resulting from a tropical infection by protozoa of the genus Leishmania which are spread by sandflies