2. (noun)nub, stub a smallpiece "a nub of coal"; "a stub of a pencil"
3. (noun)kernel, substance, core, center, centre, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty the choicest or most essential or most vital part of some idea or experience "the gist of the prosecutor's argument"; "the heart and soul of the Republican Party"; "the nub of the story"
Definition of 'NUB'
Webster Dictionary
1. (noun)NUB a jag, or snag; a knob; a protuberance; also, the point or gist, as of a story
Definitions of NUB 
