specific vs circumstantial

specific is a noun but circumstantial is not a noun.

Word	Noun	Adjective	Verb	Adverb
specific	Yes	Yes	No	No
circumstantial	No	Yes	No	No

specific (noun)	circumstantial (noun)
a medicine that has a mitigating effect on a specific disease
a fact about some part (as opposed to general)

specific (adjective)	circumstantial (adjective)
(sometimes followed by `to') applying to or characterized by or distinguishing something particular or special or unique	fully detailed and specific about particulars
being or affecting a disease produced by a particular microorganism or condition; used also of stains or dyes used in making microscope slides
relating to or distinguishing or constituting a taxonomic species
stated explicitly or in detail