Substitute rhymes with:
constitute, destitute, institute, prostitute, reconstitute, constitute, destitute, institute, prostitute, reconstitute
Substitute 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, substituted, sufficed, suffocate, suffocated, suffused, supposed, suspect, suspected