The word "scratchest" is a verb form of the word "scratch". There are a variety of synonyms for "scratchest" that can be used interchangeably depending on the context of the sentence. A few options include "scraping," "grazing," "marking," "abrasion," or "rubbing". You can also use colloquial terms such as "nick" or "dig". These synonyms can be used in situations where someone has made a slight abrasion or damage to an object or surface by scraping or rubbing against it. The usage of these synonyms may vary depending on the scenario or the tone of the conversation.