What is the Latin word for simultaneously?

The usual Latin words for “simultaneously” are simul, faciō. The right choice depends on the sense; see the distinctions below.

English → Latin

“simultaneously” in Latin

simulat the same time; simultaneously; and at the same time; and also; both … and (at once); together; not only ... but at th faciōto do (particularly as a specific instance or occasion of doing); to make, construct, fashion, frame, build, erect; to m

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

simultaneously

simul: uno et eodem tempore (at one and the same time): eodem tempore (at about the same time; e.g., to happen or occur simultaneously, eodem tempore, quo aliud, esse or fieri; e.g., bellum Volscorum eodem fere tempore quo Persarum bellum fuit, broke out almost simultaneously or at the same time when, etc.). The battle was fought simultaneously in all parts, pugnatur uno tempore omnibus locis.

Quick answer

What is the Latin word for simultaneously?: The usual Latin words for “simultaneously” are simul, faciō. 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.