PACIFIER
comforter, pacifier, baby's dummy, teething ring
(noun) device used for an infant to suck or bite on
pacifier
(noun) anything that serves to pacify
conciliator, make-peace, pacifier, peacemaker, reconciler
(noun) someone who tries to bring peace
Source: WordNet® 3.1
Etymology
Noun
pacifier (plural pacifiers)
Someone or something that pacifies. [from 16th c.]
(North America) A rubber or plastic device imitating a nipple that goes into a baby’s mouth, used to calm and quiet the baby. [from 20th c.]
Synonyms: dummy, comforter (UK, Australia, NZ), soother (Canada, Ireland), Thesaurus:pacifier
Source: Wiktionary
Pac"i*fi`er, n.
Definition: One who pacifies.
Source: Webster’s Unabridged Dictionary 1913 Edition