Over the last 10 years words have been being removed from spellcheckers. In particular the open source libs that get used by many of the web browsers to provide spell check functionality in web forms. Over time, words that refer to or are related to various 'Wrong Think' concepts are being removed. They are trying to drive these concepts out of the public lexicon so that they become memory holed. About once a year I type some word and find it un-worded. Today I discovered that 'Panopticon' has been un-worded. Give it a try. I know for a fact that the last time I typed that it was fine, but now it has the tell-tale red squiggle under it. I don't know if it is all for the browsers but it is true for FF/WF/Tor.