early
fatal
on the way out
expiringly
infant mortality
knocking on heaven's door
no spring chicken
on one's deathbed
junior
little
semperjuvenescent
senilicide
years young
ultrayoung
ageing
aging
senescent
consenescence
youngish
immortal
bereave
moribund
predeath
deathbound
die away
antemortem
senilism
immaturity
Jack Ketch
pre-dead
unyoung
in extremis
youthful
exitus
thanato-
parenticide
King of Terrors
have one foot in the grave
overyoung
young-hearted
dyingly
ghoulish
rejuvenate
morbid
instadeath
get on
age
mature
afterborn
senesce