primordial vs primeval

primordial and primeval both are adjectives.

Word	Noun	Adjective	Verb	Adverb
primordial	No	Yes	No	No
primeval	No	Yes	No	No

As adjectives, primordial and primeval are synonyms defined as:

primordial and primeval: having existed from the beginning; in an earliest or original stage or state

Other synonyms of primordial include aboriginal, primaeval, primal.

primordial (adjective)	primeval (adjective)
having existed from the beginning; in an earliest or original stage or state	having existed from the beginning; in an earliest or original stage or state