—knocker /ˈnɒk.ər/ aep /ˈnɑː.kɚ/
noun [C] (ALSO doorknocker) (METAL OBJECT)
► F0 a metal object fixed to a door that visitors use to hit the door in order to attract attentionSee picture: doorknocker 
Thesaurus+: ↑Doors and parts of doors
noun [C] (BREASTS)
knockers [plural] SLANG► F0 a woman's breasts. Some people consider this offensive.Thesaurus+: ↑The breastnoun [C] UK INFORMAL DISAPPROVING (CRITIC)
► F0 a person who is always criticizing someone or somethingThesaurus+: ↑Disapproving and criticizing , ↑Damaging reputation- ♯ Immediately
- ♯ Immobility
- ♯ Immunology and vaccination
- ♯ Importance
- ♯ Important and essential things
- ♯ Important people and describing important people
- ♯ Impossible and improbable
- ♯ Improving fertility and pest control
- ♯ Inability and awkwardness
- ♯ In and at
- ♯ In bad condition
- ♯ Including and containing
- ♯ Including and excluding
- ♯ Incomplete
- ♯ Inconsiderate
- ♯ Inconvenience
- ♯ Increasing and decreasing speed of motion
- ♯ Increasing and intensifying
- ♯ Indistinct and invisible
- ♯ Industrial action
- ♯ Industrial processing
- ♯ Industrial relations
- ♯ Industry
- ♯ Industry and industrial processes
- ♯ Inevitable