pyrogenous vs igneous

pyrogenous and igneous both are adjectives.

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

As adjectives, pyrogenous and igneous are synonyms defined as:

pyrogenous and igneous: produced under conditions involving intense heat

Other synonyms of pyrogenous include pyrogenic.

pyrogenous (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