Guanine rhymes with:
adenine, apennine, mezzanine, aberdeen, abilene, acetylene, acrolein, adenine, adenosine, albertine, algemene, alkene, allene, amphetamine, aniline, antisubmarine, apennine, ardene, argentine, arlene, aronstein, augustine, azidothymidine, balanchine, bartlestein, biocine, boeschenstein, braunstein, brillstein, bromine, bronstein, buckstein, buprenorphine, caesarean, calgene, carlene, carotene, celimene, chimerine, chloroprene, clonidine, constantine, contravene, crumrine, cyanazine, cyclosporine, darleen, darlene, dobberstein, dramamine, dryclean, eckstein, egbertine, elbertine, elephantine, ellene, emerine, eocene, epstein, ernestine, ethene, ethylene, europeenne, evaleen, evergreen, feuerstein, fierstein, finkelstein, florentine, fluorine, fromstein, gabardine, gasoline, georgene, glickstein, glucosamine, glycine, goberstein, grassgreen, grinstein, grubstein, grudenstein, guillotine, hammerstein, heseltine, hexachlorophene, histamine, histidine, holstein, hydrazine, hygiene, imogene, internecine, isoprinosine, jayewardene, josephine, kathlene, kerosene, konstantin, labyrinthine, libertine, lichtenstein, limousine, lipstein, listerine, magazine, magdalene, mangosteen, marlene, maybelline, mcelveen, mcilveen, melamine, mescaline, methazine, methylene, mezzanine, miocene, monagene, mujahadeen, murine, muscatine, naphthalene, neoprene, newsmagazine, nicotine, nothstein, nutriclean, oligocene, olivine, oncogene, opaline, orlene, osteen, overseen, paleocene, pentamidine, peregrine, pfundstein, philippine, philistine, phillipine, plasticine, pleistocene, pliocene, polyacetylene, polybutylene, polyethylene, polypropylene, polystyrene, protein, prunskiene, quarantine, rubinstein, safferstein, schottenstein, scopolamine, sharlene, silberstein, silverstein, smokescreen, soybean, springsteen, stufflebean, styrene, submarine, susswein, texstyrene, thymidine, tourmaline, undine, valvoline, vanderveen, vaseline, viagene, vitarine, vogelstein, walgreen, wasserstein, wetstein, wettergreen, wintersteen, zumstein
Guanine sounds like:
gaccione, gagan, gagen, gagne, gagnon, gahagan, gahan, gahm, gahn, gain, gainey, gama, game, gamino, gamm, gamma, gammon, gan, ganaway, ganem, ganey, ganim, gann, gannaway, gannon, gano, ganoe, gaona, gascon, gaskin, gassen, gassman, gassmann, gaughan, gaughman, gauguin, gauna, gausman, gaussian, gawain, gawen, gawne, gayman, gaymon, gean, gechem, geena, geenen, geesaman, gehm, gehman, geiken, geiman, geisen, gem, gemina, gemini, gemma, gemme, gen, gen., gena, gene, geneen, genie, genna, geno, genoa, genome, genuine, geoghegan, geon, ghana, ghanaian, gheen, giacomini, giacomo, giacone, giaimo, gian, gianini, gianino, gianni, giannini, giannino, giannone, gienow, giesen, giessen, gimme, gin, gina, ginn, ginnie, ginny, gino, gisenyi, gizmo, gnann, gnau, gnaw, gnome, gnu, goan, goeken, goeman, goemon, goen, gogan, goggin, goguen, goheen, gohman, gohn, goin, goin', goma, gone, gonia, gonium, gonna, gonya, gonyea, gonyo, googin, gookin, goon, goonan, goosen, goossen, goshen, gosman, gosney, gossen, gossman, gougeon, gouin, gowan, gowen, gowin, gown, goyim, goyne, guam, guano, guccione, guei-yuan, guenna, guggenheim, gugino, guiana, guin, guinan, guinea, guiney, guinn, guion, gum, gumi, gumina, gumm, gummi, gummy, gun, gunia, gunman, gunmen, gunn, gunnoe, gunny, guseman, gusman, gussman, guyana, guymon, guynn, guyon, guzman, gwen, gwennie, gwin, gwinn, gwyn, gwynn, gwynne, gym, gyn, gyuhama