Synonyms of obsession in English:

obsession


See US English definition of obsession

See UK English definition of obsession

See Spanish definition of obsesión

noun

1‘the idea grew in his mind until it became an obsession’

SYNONYMS
fixation, consuming passion, ruling passion, passion, mania, idée fixe, compulsion, preoccupation, enthusiasm, infatuation, addiction, fetish, craze, hobby horse
phobia, complex, neurosis
informal bee in one's bonnet, hang-up, thing, bug