writer	write
inventor	invent(osoba)
bottle - opener	open
journalist	journal
pianist	piano
socialist	social
invention	invent
pollution	pollute
happiness	happy
weakness	weak
excitement	excite
productivity	product
motherhood	mother
friendship	friend
employer	employ
childhood	child
supervisor	supervise
flexibility	flexible
communication	communicate
violinist	violin
reduction	reduce
development	develope
membership	member
involvement	involve
arrangement	arrange
replacement	replace
partnership	partner
enjoyment	enjoy
brotherhood	brother
manhood	man
physicist	physic
scientist	science
forgetfulness	forgetful
readiness	ready
forgiveness	forgive
modernity	modern
admission	admit
successful	success