timing
co-occurrence
coincidence
concurrence
conjunction
bisection
blitheness
breeziness
coexistence
counter-question
deprotonation
elate
extinguishing
getting-up
homology
indivisibility
jabbering
lock-step
origin
perfectness
prematurity
r-squared
radiancy
renascence
saltness
skirl
springiness
standardisation
you-know-who