pyrogenic vs igneous

pyrogenic and igneous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
pyrogenic	No	Yes	No	No
igneous	No	Yes	No	No

As adjectives, pyrogenic and igneous are synonyms defined as:

Other synonyms of pyrogenic include pyrogenous.

pyrogenic (adjective)	igneous (adjective)
produced under conditions involving intense heat	produced by the action of fire or intense heat
produced by or producing fever	produced under conditions involving intense heat
	like or suggestive of fire