The term 'aerostat' avoids all these problems, meaning simply a lighter-than-air craft. The concept of 'blimpworthiness' can then be replaced by asking whether or not a particular event has reached aerostatistical significance.
US tyre company and former airship builder Goodyear has come up with a new word as part of a marketing ploy. The firm, introducing online polls to determine which sporting events its iconic airships should attend, has framed the question: is a given event "blimpworthy"? Still actually a blimp. But not for long. US sports …
Unfortunately, aerostat is a wider word than blimp, or airship. A hot air balloon is an aerostat, but it is not a *dirigible*. No matter what the level of rigidity, all airships are dirigibles, almost by definition, while hot air balloons are not.
So my vote is for going back to basics and calling them dirigibles, like they often did in my youth.
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