middle youth
middle age
preclimacteric
middle way
dote
middlescence
present times
adolescent
contemporary world
modern world
modern times
midage
agelessness
age
oldhood
Grandma Moses
middle-aged
no spring chicken
time
grownish
big
millennially
timeless
ageistically
midlifer
oldness
age like milk
have one's whole life ahead of them
of age
autumnity
in one's time
ageostrophy
hypomature
seniorhood
subadolescent
nonmature
senilism
nonsenior
presenile
not look a day over
schooldays
OK, boomer
ageistic
beardless
A.
youngness
eldership
elderly
middle-agedness
age of discretion
ageism
come of age
yonks
agerasia
to age
child
mutton dressed as lamb
vicenarian
big girl
twentysomething
date
anecdotage
mannish
act one's age, not one's shoe size
postmillenarianism
once a man, twice a child
age is just a number
adultescence
eld
of a certain age
youthman
superannuation
peramorphosis
grownupness
aged
oldify
yoof
adultship
beat the clock
age like a fine wine
superannuate
cobwebbiness
cycle
antiquity
ancientness
untime
afterage
age regressor
senesce
young
past
transyouth
get on
turn
teenagedom
tween