fundamental vs primal

fundamental is a noun but primal is not a noun.

Word	Noun	Adjective	Verb	Adverb
fundamental	Yes	Yes	No	No
primal	No	Yes	No	No

As adjectives, fundamental and primal are synonyms defined as:

Other synonyms of fundamental include cardinal, central, key.

fundamental (noun)	primal (noun)
the lowest tone of a harmonic series
any factor that could be considered important to the understanding of a particular business

fundamental (adjective)	primal (adjective)
being or involving basic facts or principles	having existed from the beginning; in an earliest or original stage or state
serving as an essential component	serving as an essential component
far-reaching and thoroughgoing in effect especially on the nature of something