oldness
senescent
ageing
alas!
anergy
angiogenesis
atypia
boomerang
codon
corpulency
decrepitude
defoliation
dither
doggrel
dotage
gelation
neurobiology
optimisation
petard
radiosensitivity
recreancy
saintship
senility
sexualization
superannuation
tumorigenesis
waker
acquiescence
adolescence
coalescence
convalescence
essence
evanescence
luminescence
obsolescence
phosphorescence
quintessence