- Being young is handy for a person with a lisp
- boyish man
- Girlish or boyish
- Immature, juvenile
- Juvenile
- Lisp useful for young at heart
- What a lisper might call useful, when young
- Adolescent
- Adolescent makes mum irate
- Childish
- Green
- Juvenile
- Not fully developed
- Puerile
- He treats minor illnesses
- Young doctor?