Neotenic is a term used to describe a phenomenon where an organism reaches sexual maturity but retains juvenile physical characteristics. However, there are several synonyms for the word neotenic which can be used in different contexts. These include juvenilization, pedomorphic, progenesis, neotenous, and pedomorphic. Juvenilization is the retention of juvenile traits in an adult form, while pedomorphic refers to the retention of larval or juvenile characteristics. Progenesis refers to the acceleration of sexual development, while neotenous means the retention of juvenile traits. Pedomorphic is a term used to describe an organism that has retained juvenile characteristics in its adulthood. Using these synonyms can help in avoiding repetition and adding diversity to one's vocabulary.