Porphyritic rhymes with:
neritic, analytic, arthritic, bittick, catalytic, chittick, citic, critic, cushitic, dendritic, electrolytic, granitic, halophytic, hamitic, hemolytic, hermaphroditic, neritic, palmitic, paralytic, parasitic, psychoanalytic, semitic, soditic, thrombolytic, zitek
Porphyritic sounds like:
perforates, perverts, preferreds, properties, properties', property's, purebreds, purports