There are currently 2 astronomical definitions for the tag 'supergiant'.
supergiant
supergiant star
asupergiant, bsupergiant, fsupergiant, gsupergiant, ksupergiant, osupergiant, earlytypesupergiant, latetypesupergiant
hubblesandagevariablestar, lcvariablestar, rcoronaeborealisstar, hypergiant, irregularvariablestar, semiregularvariablestar, supermassivestar