you can say both (marhaban_مرحبًا) (marhaba_مرحبا) Both of them for men and women no difference

Is 'مرحبًا' spelled marhabeen or marheeb? :::::::::::::::::::::::::::::::::::::::::::::::::::::::::: you are almost correct, just little small comment: this word supposed to pronounce: "marhaban" you are welcome anytime

marhaban_مرحبًا) = Formal language=fuss haa .. but accepted widely (marhaba_مرحبا)= light version of that , commonly used.

we use 'مرحبًا' for both men and women and it's mean hello. hope that will help you