dominant vs prevailing

dominant is a noun but prevailing is not a noun.

Word	Noun	Adjective	Verb	Adverb
dominant	Yes	Yes	No	No
prevailing	No	Yes	No	No

As adjectives, dominant and prevailing are synonyms defined as:

Other synonyms of dominant include predominant, prevalent, rife.

dominant (noun)	prevailing (noun)
an allele that produces the same phenotype whether its paired allele is identical or different
(music) the fifth note of the diatonic scale

dominant (adjective)	prevailing (adjective)
exercising influence or control	most frequent or common
(of genes) producing the same phenotype whether its allele is identical or dissimilar
most frequent or common