from adj. to noun
serious
seriousness
diverse
refer
reference
inventor
invention
signify
significant
tolerant
tolerance
reluctance
reluctant
store
storage
leader
leadership
grow
growing
ignorant
ignorance
joke
jokey/joky
sight/see
sight
critic
criticism
comprehend
comprehensible
absent
absence
utility
utilitarian
refuse
refusal
king
kingdom
respect
respectful
fatal
fatality
price
pricy/pricey
insist
insistence
captive/captor
captivity
admire
admirable