child·ish 
(chīldĭsh)
(chīldĭsh)adj.
1. Of, relating to, or suitable for a child or childhood: a high, childish voice; childish nightmares.
2. Marked by or indicating a lack of maturity; puerile: tired of your childish pranks. See Synonyms at young.
childish·ly adv.
childish·ness n.
- subspecialization
- subspecialize
- subspecialty
- subspecies
- subspecific
- subst.
- substage
- substance
- substance abuse
- substance abuser
- substance P
- substance use disorder
- substandard
- substantia gelatinosa
- substantial
- substantiality
- substantially
- substantialness
- substantia nigra
- substantiate
- substantiation
- substantival
- substantivally
- substantive
- substantively