prodromic vs prodromal

prodromic and prodromal both are adjectives.

Word	Noun	Adjective	Verb	Adverb
prodromic	No	Yes	No	No
prodromal	No	Yes	No	No

As adjectives, prodromic and prodromal are synonyms defined as:

prodromic and prodromal: symptomatic of the onset of an attack or a disease

prodromic (adjective)	prodromal (adjective)
symptomatic of the onset of an attack or a disease	symptomatic of the onset of an attack or a disease