moreover    bitayeko, uteko, ikigeretseko, ubwo, nubwo
En-En dictionary 
ndetse   conj    1. except, 2. moreover
ikigeretseko     conj    furthermore, moreover
ubwo   1. perhaps, 2. now that, 3. since, 4. seeing that, 5. moreover
bitāyeko     conj    in order that, moreover, furthermore
uteko     conj    moreover