Twelve (12). Used, as an alternate word, by those who wish to rid the English-speaking number system of remnants of an extinct base-12 number system and de-anomalise the ubiquitous base-10 (decimal) system.
"Seconteen months hath one year", quoth Wittingstein. "And twice seconteen maketh one day", addeth Kant. "Of that we can both be sure!"