The phrase "the th state" refers to the numerical order of states being discussed, where "th" represents any number. Synonyms for this phrase may include "the nth state" or "state number nth". This terminology is commonly used to indicate a specific state in a sequence or list. For instance, when discussing the chronological order of statehood, "the 13th state" would refer to the state that entered the Union as the thirteenth. Likewise, "the 50th state" would denote the state that became the last to join the United States. Thus, these synonyms play a crucial role in precisely identifying a state's rank in a sequence.