immaturity
noun
[ ˌɪməˈtʃɔːrɪti ]
• the state of being immature or not fully grown.
• "the immaturity of the immune system in very young children makes them especially vulnerable"
Similar:
unripeness,
greenness,
sourness,
newness,
rawness,
crudeness,
crudity,
imperfection,
incompleteness,
lack of completion,
lack of development,
childishness,
babyishness,
infantilism,
juvenility,
puerility,
lack of experience,
inexperience,
unworldliness,
naivety,
ingenuousness,