When referring to a wide variety of things, the phrase "all manner of something" can be replaced with several synonyms to add some variety and interest to your writing. Words such as "a plethora of," "countless," "endless," "multifarious," and "myriad" can all be used in place of "all manner of something" to convey the same idea. Other options include "various," "diverse," "assorted," and "sundry." Using these synonyms not only adds more color to your language, but it can also make your writing more concise and precise, helping your readers understand your message more effectively.