The word "straight-laced" is often used to describe someone who is strict and has a tendency to conform to societal norms. If you're looking for synonyms for this word, you may consider "rigid", "uptight", "puritanical", "conventional", or "stuffy". These words allude to a person who is conservative in their beliefs, morals, or behavior, and who is resistant to change or deviation from the established norm. Other alternatives to "straight-laced" might include "buttoned-up", "prudish", "stern", or "austere". Each of these terms can be used to describe someone who is overly strict or conservative in their thinking and demeanor.