If we are to take nominalism as 1) the rejection of universals, or 2) the rejection of abstract objects (of the mind) then I am neither.
What I reject is that universals or abstract objects are things in the conventional sense, or even real objects (of the mind). This sentient/animate being conceptualises universals, abstract objects and concrete objects, that is, conceptualisation is a process of a thing, this thing, and not a thing-in-itself. A process is a “characteristic” of a thing.
The communicative symbol is the only “thing” in common between a universal or abstract object (of the mind) in mine and another person’s mind.