Is it ensure, insure, or assure?
noun suffix meaning "sight, view, spectacular display or instance of," 1824, abstracted from panorama (q.v.), ultimately from Greek horama "sight, spectacle, that which is seen."
used to form nouns A spectacular display or instance of what is indicated: boatarama/ bunsorama/ videorama
[1824+; fr panorama, ultimately fr Greek horama, ''sight'']