Here's what rhymes with unhistorically.
historically prehistorically Words that almost rhyme with unhistorically
symbolically metabolically diabolically vitriolically bucolically alcoholically comically conically phonically bionically chronically sardonically demonically histrionically periodically philosophically methodically monotonically laconically harmonically episodically melodically lethargically mnemonically electronically analogically pedagogically knowledgeably ethnologically demagogically hydroponically technologically catastrophically exorbitantly genealogically ultrasonically anthropomorphically