1.grudge

N-COUNT If you have or bear a grudge against someone, you have unfriendly feelings toward them because of something they did in the past.

2.leer

V-I If someone leers at you, they smile in an unpleasant way, usually because they are sexually interested in you.

3.apparition

N-COUNT An apparition is someone you see or think you see but who is not really there as a physical being.

4.hallucination

N-VAR A hallucination is the experience of seeing something that is not really there because you are ill or have taken a drug.