Voidromantic is an aro-spec orientation where one's orientation feels hollow or it feels like a void where one's romantic orientation should be. It is similar to the difference between agender and gendervoid. Someone aromantic may feel as though they have never really felt romantic attration in the first place, however, a voidromantic individual may feel like there is a place where romantic attraction would or should be but they are simply unable to experience it.
The sexual equivalent is voidsexual.
History
Voidromantic and voidsexual were coined on or before February 17, 2015 by Tumblr user Y0suke through MOGAI-Archive[1].