Synonyms for Hollow (same or very similar meaning)
WordNet sense 1 (a small valley between mountains):
holler
WordNet sense 2 (a depression hollowed out of solid matter):
hole
WordNet sense 3 (having nothing inside):
empty
WordNet sense 4 (having a sunken area):
sunken
WordNet sense 5 (being or suggesting a cavern):
cavernous
WordNet sense 6 (deliberately deceptive):
false
WordNet sense 7 (lacking sincerity):
insincere
WordNet sense 8 (having a tendency to reverberate or be repeatedly reflected):
ringing, reverberant
WordNet sense 9 (devoid of significance or point):
vacuous
WordNet sense 10 (having no meaning or direction or purpose):
nonmeaningful
WordNet sense 11 (remove the inner part or the core of):
dig, excavate
WordNet sense 12 (remove the interior of):
hollow out, core out
From the ODE community, based on WordNet
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