Fenphen rhymes with:
ahlgren, almgren, amgen, ampligen, berggren, bergren, berumen, blomgren, brakemen, bushmen, cameramen, cancienne, cedergren, chairwomen, clarken, classmen, corten, craftsmen, cytogen, dahmen, detienne, dohmen, dolgen, edgren, ehmen, elvgren, epogen, etienne, forewomen, forsgren, freemen, frenchmen, fugotsten, galyen, garsten, gatien, halen, halgren, hallgren, helgren, hinmen, holmen, holmgren, holven, houten, hultgren, kamen, kelemen, kinmen, korbren, lagergren, landgren, lemen, lemmen, liljegren, lindgren, lofgren, lovgren, lucienne, lundgren, lungren, malmgren, marksmen, mellgren, meskimen, midshipmen, montien, mutagen, nordgren, nygren, ogren, ostergren, palmgren, policewomen, rosengren, sandgren, seagren, servicemen, shogren, sodergren, solingen, somatogen, stromgren, strossen, uelmen, underclassmen, vonallmen, watchmen, westergren, yepsen, youngren