Infectious rhymes with:
anxious, fractious, noxious, obnoxious, rambunctious, ambitious, anxious, atrocious, audacious, auspicious, capacious, capricious, cautious, ceraceous, confucius, conscientious, conscious, contentious, crustaceous, delicious, efficacious, expeditious, facetious, factitious, fallacious, ferocious, fictitious, flirtatious, fractious, gracious, hellacious, herbaceous, horatius, ignatius, injudicious, judicious, loquacious, lucius, malicious, mendacious, moshus, nauseous, noxious, nutritious, obnoxious, ostentatious, overambitious, pernicious, perspicacious, precious, precocious, predaceous, pretentious, propitious, proteinaceous, rambunctious, repetitious, salacious, sebaceous, seditious, semiprecious, spacious, specious, subconscious, supercalifragilisticexpealidoshus, superstitious, surreptitious, suspicious, tenacious, tendentious, unconscious, unpretentious, vexatious, vicious, vivacious, voracious
Infectious sounds like:
impacts, infects, infests, invests