The word "babyishnesses" refers to traits, behaviours or characteristics that are infantile. Synonyms for this term include immaturity, childishness, naivety, innocence, and simplicity. The term can also imply a lack of sophistication or refinement, and synonyms for this aspect include unsophisticated, unsavvy, uncultured, and unworldly. Other synonyms for "babyishnesses" can include petulance, tantrums, and whining. However, it should be noted that using the term in a derogatory manner can be seen as insensitive, especially since it may be indicative of a larger issue, such as a developmental disorder or a mental health condition.