tonite
adv.
colloquial shortening of tonight, attested by 1918.
Present-day student notices on bulletin boards, etc., read oftener than not, "Party Friday Nite," "Meeting Tonite," "Kum Tonite," etc. [Louise Pound, Spelling-Manipulation and Present-Day Advertising, "Dialect Notes," 1923]
n.
explosive used in blasting, 1881, from Latin tonare "to thunder" (see thunder, n.) + -ite(2).