bombast , n :
(archaic) Cotton, or cotton wool. (archaic) Cotton, or any soft, fibrous material, used as stuffing for garments; stuffing, padding. (figuratively) High-sounding words; language above the dignity of the occasion; a pompous or ostentatious manner of writing or speaking.
Source http://handbookblogger.blogspot.com/2017/09/bombast-word-of-day-for-september-30.html
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