"Disregardances" is a rare and archaic word that has become obsolete in modern English. However, there are several synonyms that can replace it and convey a similar meaning. For example, "neglect", "indifference", "apathy" and "disinterest" are all synonyms that suggest a lack of attention or concern. Similarly, the words "inattention", "heedlessness" and "carelessness" suggest a failure to pay proper attention to something. Lastly, "nonchalance", "unconcern" and "insouciance" all convey a sense of indifference or casualness towards something. These synonyms are useful for expressing a disregard or lack of attention in various contexts, from personal relationships to professional settings.