The Kilner jar is a popular household item, but did you know that it has several synonyms? One of the most common synonyms is the Mason jar, which is a similar glass jar with a screw-top lid. Another synonym is the canning jar, which is specifically designed for preserving and canning food. The similar French jelly jar is also a popular choice, as is the Weck jar, which features a rubber seal and stainless steel clamps. In addition, vintage and antique versions of the Kilner jar can be labeled as fruit jars, fruit preserves jars, or pickling jars. No matter which synonym you prefer, these jars are a versatile and stylish addition to any home.