"obsessed" in the verb sense
1. haunt, obsess, ghost
haunt like a ghost pursue
"Fear of illness haunts her"
2. obsess
be preoccupied with something
"She is obsessing over her weight"
"obsessed" in the adjective sense
1. haunted, obsessed, preoccupied, taken up
having or showing excessive or compulsive concern with something
"became more and more haunted by the stupid riddle"
"was absolutely obsessed with the girl"
"got no help from his wife who was preoccupied with the children"
"he was taken up in worry for the old woman"
2. obsessed, possessed
influenced or controlled by a powerful force such as a strong emotion
"by love possessed"
Source: WordNet® (An amazing lexical database of English)
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