Suffocate rhymes with:
pontificate, abdicate, aguacate, allocate, aluminosilicate, authenticate, communicate, complicate, dedicate, deprecate, domesticate, educate, equivocate, eradicate, excommunicate, explicate, extricate, fabricate, indicate, intoxicate, misallocate, miscommunicate, pontificate, predicate, prognosticate, reciprocate, rededicate, reeducate, replicate, sophisticate, unallocate, uncomplicate
Suffocate sounds like:
safest, savaged, savasta, savviest, scapegoat, scapegoated, sebesta, spaced, spacesuit, spaghetti, specht, speight, spiced, spight, spigot, spiked, spooked, sposato, sposito, subacute, subject, subjected, subjugate, subjugated, subset, subside, subsided, subsidy, subsist, substitute, substituted, sufficed, suffocated, suffused, supposed, suspect, suspected