There are several synonyms for the word "deeper", each with slightly different connotations. One synonym is "profound", which suggests a level of insight or understanding beyond the surface. Another synonym is "intense", which implies a strong emotional or sensory experience. "Substantial" is also a synonym, emphasizing the importance or weight of something. Alternatively, "bottomless" connotes infinity or endlessness, while "penetrating" suggests a thorough or piercing quality. Finally, "complex" implies a depth that can be difficult to fully understand or unravel. Overall, the word "deeper" is just one of many possible ways to convey the idea of increased depth or complexity.