I'll avoid the obvious one (variable) and say vector. And lets not, of course, forget our friend volume.
vector
It dont start with a 'J' it starts with a 'V' VAGINA ROOT !
vector, vertex, there are probably others
Three letter words that start with V are:vanvatvetvievim
VainVaneVailVoltVentVestVoteVeal
Words that start with the letter V are, valley, violin, violet and violence. Virus, viola, vengeance and vast all start with V.
Vacation??
vicious
quav
No original Arabian words start with the letter v , as this letter has no corresponding in Arabic.
Vows are romantic words. The word begins with the letter v.
I don't believe that there is a v in the Japanese language.... ._.