Cautiously rhymes with:
ambitiously, anxiously, consciously, expeditiously, facetiously, fallaciously, graciously, hellaciously, ostentatiously, subconsciously, surreptitiously, suspiciously, tenaciously, unconsciously, viciously
Cautiously sounds like:
castiglia, catcall, catchall, catskill, cudgel, cutchall, cuticle, cutshall