Fsi rhymes with:
ofc, ac, addressee, amc, apc, artsy, bbc, bresee, c, cc, cdc, cie, cxc, emcee, foresee, forsee, gassee, gnc, gutsy, hohensee, jaycee, jessee, keesee, kissee, knbc, lessee, licensee, losee, lxi, nic, ofc, oversea, pc, piercey, powerpc, sci, sea, see, si, sie, sieh, sightsee, tenn, tennessee, tootsie, tse, t_a_c, undersea, u_s_m_c, woodmansee, yangtze
Fsi sounds like:
f's, f.'s, faas, fac, face, faces, facey, facie, fag, fagg, fags, fahs, fake, fakes, fasick, fasig, faso, faso's, fass, faubus, faucheux, fauci, faus, fausey, fauss, faux, favazza, fawbush, fawkes, fax, faxes, fay's, faye's, fayez, faz, faze, fazekas, fazio, fazzio, fe's, feces, feck, feeback, feebis, fees, feese, feick, feig, feige, feis, fejes, fescue, fess, fez, fiacco, fiasco, fiascos, fica, ficco, ficek, fichus, fick, ficke, fickes, fico, fiebig, fiefs, fig, figg, figge, figgie, figgie's, figgs, figs, fiji, fiji's, fike, fikes, fipps, fis, fisc, fisch, fiscus, fish, fish's, fishes, fishy, fisk, fisk's, fiske, fiske's, fiss, five's, fiveash, fives, fix, fixes, fizz, fobbs, fobes, focaccia, focus, focuses, foes, fog, fogg, fogg's, foggy, fogs, fogy, foisy, fooks, foos, foose, fooshee, fosco, foshee, fosia, foskey, foss, fosse, fossey, fossey's, fouch, fouche, fouse, fousek, foushee, fowkes, fox, fox's, foxes, foxx, foxy, fs, fucci, fuchs, fuchsias, fuck, fucks, fugazy, fuge, fugue, fugues, fuhs, fuji, fuji's, fujii, fujikawa, fujio, fujioka, fujis, fujisawa, fujiya, fuke, fukowoka, fukui, fukuoka, fuoco, fuoss, fuqua, fuquay, fusco, fuse, fuses, fuss, fusses, fussy, fuzes, fuzz, fuzzy, fyffes, fyke, fyock