Yes. Hallucinations and delusions are related but distinct symptoms. A hallucination is a sensory experience—seeing, hearing, tasting, smelling, or feeling something that is not actually there.
A delusion is an unshakable false belief held despite clear contrary evidence, such as believing one has special powers or is being poisoned when the facts show otherwise. Both can appear in psychosis and other conditions, but hallucinations distort perception while delusions distort belief.