1) Jam spreader 2) Kitchen knife 3) Serrated kitchen implement 4) Serrated kitchen tool 5) Spreader of the theme answers 
Bread knives are used for cutting bread and are one of many kitchen knifes used by chefs. The serrated blades of bread knives are able to cut soft bread without crushing it. ==History== One such knife was exhibited at the World`s Columbian Exposition in 1893 in Chicago by the Friedrich Dick company (Esslingen, Germany). One design was patented in....
Bread knife is London Cockney rhyming slang for wife.
[n] - a knife used to cut bread
noun a knife used to cut bread
a knife designed or suitable for slicing bread, as one having a wavy or saw-toothed blade.