  A comprehensive study of favoured and unfavoured $\alpha$-decay, cluster
decay, weak-decay along with spontaneous fission in undetected superheavy
nuclei within the range for proton number 111$\leq$Z$\leq$118 and neutron
number 161$\leq$N$\leq$192 is performed. Half-lives for various mentioned
decays are estimated with good accuracy on the basis of NUBASE2020 and are
found in excellent match with the known half-lives. $\alpha$-decay mode is
found most probable in this wide range and correspondingly potential
$\alpha$-decay chains are reckoned. Peculiarly, the chances of cluster
emission, as well as weak-decay, are also anticipated in this region of the
periodic chart which open new pathways of detection of superheavy nuclei.
