The word "khub" meaning" Nice,OK" Also, it is just,an adjective. But the word "khubi" usually is used when you greet. This kind of greet is in the intimate conversations & Intimate. And has no official position. When you meet your friend, And you want to tell him" How are you?" You can say " khubi?" I hope will be useful for you

khobe means good خوبه

if u mean "khob" (خوب) like 'look" then it means "well" however if u mean "khoob" like "boot" then ie means "good" but generally it has lots of meanings when u use it in different occasions and with different tunes.