In half an hour a good-sized gas-bag had been formed, and the jerking and straining upon the thongs showed that it was capable of considerable lift.
Source: wiktionary
Ranked by relevance and common usage.
Keep "gasbag" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "gasbag" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "gasbag", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "gasbag" or choose a simpler alternative from the closest-match group.
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11 total sentences available.
In half an hour a good-sized gas-bag had been formed, and the jerking and straining upon the thongs showed that it was capable of considerable lift.
Source: wiktionary
By this method of construction a considerable amount of support can be imparted to the gasbag, though it does not dispense with the services of the ballonet, as does the entirely rigid type.
Source: wiktionary
A novel robotic gasbag polishing technique based on flexible polishing principle has been presented by S.M. Ji et al., which can make polishing process more stable and effective because the rubber gasbag provides cushioning action and almost all abrasive particles in the contact area are involved in the process of material removal on mould surface, etc […]
Source: wiktionary
Not that the Reverend James is absolutely a pretentious gasbag any more than Marchbanks is an inspired prophet. He has a definite, a positive part in the world's work.
Source: wiktionary
Showing 4 of 11 available sentences.
Closest matches include windbag, blowhard, aerostat, agreeable rattle, airship.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.