Til now, up to this point, so far, hitherto, heretofore, as yet, until the present, till this moment, before this, prior to this time, until now. These phrases all mean the same thing - referring to something that has happened or been true up until the present moment. They can be used interchangeably depending on the context and the speaker's preference. It is useful to have a variety of synonyms to choose from as it can make writing more interesting and engaging. Always remember to consider the tone and meaning you wish to convey when selecting and using words.