"Plain people" is a term often used to describe those who lead simple lifestyles and follow traditional values. However, there are several alternative synonyms that can be used to describe individuals who fit this description. One common alternative is "humble folk," which tends to imply a sense of modesty and lack of pretension. "Provincial" is another excellent option, often used to describe individuals from rural areas who maintain a connection to their roots. "Rustic" is another word to consider, which generally refers to individuals who lead simple, country-style lives. Finally, "old-fashioned" can be used to describe those who prefer traditional ways of life and values.