unitary is the antonym; this is where supreme power of a state all rests in one body for example Westminster in the UK.
Yes, the noun 'federalism' is an abstract noun, a word for a system of government; a word for a concept.
The noun 'federalism' is a common, uncountable, abstract noun; a word for a type of government; a word for a concept.
Ignore
traits
disgrace
mess
out door
Diurnal diurnal
Talkative or outgoing.
destroy or ruin
noun
Federalism