Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun obsession

2 senses of obsession

Sense 1
compulsion, obsession -- (an irrational motive for performing trivial or repetitive actions, even against your will; "her compulsion to wash her hands repeatedly")
       => irrational motive -- (a motivation that is inconsistent with reason or logic)

Sense 2
obsession, fixation -- (an unhealthy and compulsive preoccupation with something or someone)
       => preoccupation -- (an idea that preoccupies the mind and holds the attention)