The word "hundred-and-ninetieth" is rarely used in everyday language, but it refers to something that comes after 189 other items. Synonyms for this particular word include "one-hundred and ninetieth," "189th + 1," "one more than one-eighty nine," and "the second-to-last item in a group of 190." Additionally, one could also use phrases such as "the last-but-one item" or "the second-to-last item in a list of one hundred and ninety things." These synonyms may be more useful in everyday language when trying to convey the same idea or number without using the actual word "hundred-and-ninetieth".