sand fly vs sandfly

sand fly and sandfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
sand fly	Yes	No	No	No
sandfly	Yes	No	No	No

As nouns, sand fly and sandfly are synonyms defined as:

sand fly and sandfly: any of various small dipterous flies; bloodsucking females can transmit sandfly fever and leishmaniasis

Other synonyms of sand fly include Phlebotomus papatasii.

sand fly (noun)	sandfly (noun)
any of various small dipterous flies; bloodsucking females can transmit sandfly fever and leishmaniasis	any of various small dipterous flies; bloodsucking females can transmit sandfly fever and leishmaniasis