Nicolai rhymes with:
adlai, adlai, arai, budai, desai, hirai, kawai, kraai, kumagai, masai, mathai, mcgoey, mukai, nagai, nakai, pai, rai, sakai, sakurai, stai
Nicolai sounds like:
naegele, naegeli, nagel, nagele, nagle, nangle, nasal, nasally, naugle, neagle, necula, negley, neglia, nessel, neuzil, newsweekly, niccoli, nicely, nichol, nichola, nichole, nicholi, nicholl, nickel, nickell, nickle, nicklow, nickol, nicley, nicol, nicola, nicolae, nicolau, nicolay, nicole, nicoli, nicoll, nicolle, nicolo, nigel, niguel, nikkel, nikola, nikolai, nisley, nissley, nocella, noggle, nogle, noisily, nosal, noxell, nozzle, nuclei, nussle, nuxoll, nuzzle