The term "piano tinkler" can be replaced with several synonyms depending on the context and tone of the situation. For instance, a person who plays the piano enthusiastically and skillfully can be called a "pianist" or a "keyboardist." Alternatively, if the person's skills are considered average or mediocre, they might be referred to as a "piano player." Other synonyms include "musician," "piano maestro," "piano virtuoso," "piano expert," "piano performer," and "piano enthusiast." However, it's important to use these synonyms wisely and respectfully to avoid insulting or belittling someone's talent or ability.