Here's what rhymes with undetected.
ejected dejected rejected defected respected inspected deflected unprotected interjected indirected subjected unexpected unaffected unconnected disaffected intersected resected unsuspected misdirected redirected uncorrected uncollected uninfected prospected trisected disconnected resurrected disrespected introspected reinspected interconnected recollected reconnected retrospected Words that almost rhyme with undetected
detested pelted dented bested betted jetted texted destined attested scented bedded demented indented repented tepid vented wetted wrested abetted dissented netted undigested whetted vetted guested stetted prevented embedded wretched dreaded assented excepted beheaded divested fretted imbedded leaded relented sweated untested retested breaded pretested unattested bedimmed gelid pirouetted quested accepted requested unprecedented lamented regretted appended distended exempted welded mended molested unmolested disparaged uncontested gazetted preempted presaged wended brevetted fended stenciled headwind rearrested trellised trended vended bayonetted coquetted facetted unscented kennelled sledded towheaded vignetted cossetted expended consented discontented befriended complemented complimented unattended unintended disoriented polarised silhouetted portended regimented reinvented reinvested unrepresented depolarised ricochetted alimented retreaded contended commended comprehended ornamented circumvented sulphuretted solemnised burglarised misrepresented transcended underrepresented vulgarised