LATIN DICTIONARYLexicon Latīnum
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“boom” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

boom s.
longurius: contus: pertica [Vid: POLE].
Obex (obstacle): perhaps agger portum muniens.
boom v.
fluctuare: undare: aestuare: exaestuare (boil violently): saevire (rage). To come booming (i. e., with swelling sails), velis passis aliquo pervehi.

Quick answer

What is the Latin word for boom?
The usual Latin words for “boom” are longurius, contus, pertica; also ō̆bex, flūctuō, undō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.