Tipsier is a term often used to describe someone who is becoming increasingly intoxicated or inebriated. However, there are a variety of synonyms that can be used as alternatives to this word. One option could be "drunker", which refers to someone who has consumed a large amount of alcohol. Another term that could be used is "more inebriated", which indicates a higher level of intoxication. Additionally, one might use the word "wasted" to describe someone who is extremely drunk or "plastered" to convey a similar meaning. Overall, there are several synonyms for "tipsier" that can be utilized depending on the context and desired level of intensity.