Firfer rhymes with:
surfer, urfer, alderfer, alfre, aquifer, autobiographer, belfer, benfer, beougher, biographer, bluffer, bosendorfer, briefer, buffer, calligrapher, canfor, choreographer, christopher, cinematographer, cipher, cocanougher, coffer, colfer, compher, conifer, copher, counteroffer, crystallographer, cullifer, cullipher, cypher, dechristopher, decipher, demographer, diefenderfer, diffenderfer, differ, dudenhoeffer, duffer, emmendorfer, enfor, feffer, fifer, fulfer, geffre, gennifer, geographer, giefer, golfer, gopher, grundhofer, guiffre, hafer, haufer, heifer, helfer, hepfer, hoefer, hofer, hoffer, hopfer, huffer, hupfer, jeffer, jennifer, jodohur, kafer, kampfer, kapfer, kaufer, keefer, keffer, keifer, keiffer, kelnhofer, kempfer, kiefer, kieffer, kifer, kipfer, kirchhofer, klepfer, klinghoffer, kloepfer, klopfer, knipfer, kochendorfer, kristopher, kupfer, lafer, laffer, lamphere, lanfear, langenderfer, lanpher, laufer, lauffer, leifer, leuffer, lexicographer, liefer, lifer, loafer, lucifer, lupfer, manfre, muldorfer, mulldorfer, neuendorffer, nidiffer, nufer, nuffer, nuhfer, oceanographer, ofer, offer, opfer, peffer, peifer, peiffer, pfeffer, pfeifer, pfeiffer, pfeuffer, phifer, philosopher, photographer, pifer, pilfer, pipher, pornographer, proffer, puffer, pulsifer, pulsipher, redifer, reefer, reichelderfer, rempfer, reoffer, rodefer, rodeffer, roofer, rougher, rufer, ruffer, safer, saffer, safir, sandefer, sandefur, sanderfer, sandifer, schaefer, schaeffer, schafer, schaffer, scheffer, schiefer, schieffer, schiffer, schlafer, schleifer, schopfer, schriefer, schroepfer, seehafer, seifer, shaefer, shaeffer, shafer, shaffer, sheaffer, sheffer, shiffer, siderographer, slifer, sniffer, snouffer, snuffer, sofer, soffer, soifer, soiffer, sopher, staffer, standefer, standerfer, standifer, stanifer, stauffer, stenographer, stiffer, stofer, stoffer, stonecipher, stonecypher, stonesifer, stopher, storfer, stouffer, stuffer, suffer, sulfur, sulphur, surfer, sypher, telfer, telfor, telfour, toepfer, tougher, ulshafer, uncapher, unkefer, urfer, videographer, wafer, waifer, wettlaufer, wolfer, woofer, yourselfer, zephyr, zimpfer, zwiefelhofer
Firfer sounds like:
faerber, farber, farberware, farver, ferber, fervor, firepower, forebear, forever, frappier, furber, furfaro