The term "lower strata" often refers to a social class or group of people who exist at the bottom rungs of society. Synonyms for this term could include "underclass," "impoverished," "deprived," and "disadvantaged." Other terms that might be used to describe those in the lower strata include "marginalized," "oppressed," and "vulnerable." These individuals may also be referred to as "have-nots," "poor," or "working poor." It's important to remember that these terms are often used to categorize people based on economic circumstances, and that they can carry negative connotations or be stigmatizing. It's important to approach these concepts with empathy, understanding and clear-headedness.