Which suffix 1?
relax
tion
satisfy
satisfaction
inform
information
relation
relationship
equal
e-q-u-a-l-i-t-y
strong
th
lonely
loneliness
achieve
achievement
participate
participation
champion
c-h-a-m-p-i-o-n-s-h-i-p
equal
ity
involve
involvement
sad
sadness
enjoy
enjoyment
happy
h-a-p-p-i-n-e-s-s
star
dom
necessary
necessity
grow
growth
involve
incolvement
lonely
l-o-n-e-l-i-n-e-s-s
excite
ment
reader
readership
warm
warmth
reader
readership
free
f-r-e-e-d-o-m