security blanket

English Thesaurus

1. a blanket (or toy) that a child carries around in order to reduce anxiety (noun.artifact)

hypernym	:	blanket, cover,
definition	:	bedding that keeps a person warm in bed (noun.artifact)

2. anything that an adult person uses to reduce anxiety (noun.artifact)

hypernym	:	thing,
definition	:	an entity that is not named specifically (noun.artifact)

domain usage	:	colloquialism,
definition	:	a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech (noun.communication)