What is the suffix to abstract noun?
The suffixes -ship and -hood are usually added to other nouns to form abstract nouns. The suffix -th is added to an adjective to form an abstract noun and -dom can combine with either a noun or an adjective.
How do you form an abstract noun from a verb?
Take the verb relax. To describe the general state of relaxing, add the suffix -ation to make the abstract noun relaxation. The adjective good takes the suffix -ness to become the abstract noun goodness. The concrete noun friend needs -ship to make the abstract noun friendship.