monomania

English Thesaurus

1. a mania restricted to one thing or idea (noun.motive)

hypernym	:	cacoethes, mania, passion,
definition	:	an irrational but irresistible motive for a belief or action (noun.motive)

derivation	:	monomaniacal,
definition	:	obsessed with a single subject or idea (adj.all)

derivation	:	monomaniacal,
definition	:	obsessed with a single subject or idea (adj.all)