SORDIFEROUS

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def die dif dis doe dor dos due dui duo eds efs err ers ess fed fer fes feu fid fie fir foe for fou fro fud fur ids ifs ire ode ods oes ore ors ose oud our red ref rei res rid rif rod roe rue sei ser sir sis sod sos sou sri sue udo urd use

defi dies difs dire diss doer does door dore dorr dors dose doss dour dues duos dure duro durr eros errs euro feds feod fess feud feus fido fids fire firs foes food ford fore foss four froe fuds furs fuse fuss ides ired ires odes odor ordo ores oses ouds ours redo reds refs reif reis ride rids rife rifs rise rode rods roes rood roof rose roue rude rued ruer rues ruse seif seis serf sers side sire sirs sods sord sore sori sour sous sris suds sued suer sues surd sure surf udos urds used user uses