This is the 4054th most frequent Catalan word.
demòcrata
A supporter or advocate of democracy.
Here, 'demòcrata' is a noun referring to someone who supports democracy.
Ell és un demòcrata convençut.
He is a convinced democrat.
In this sentence, 'demòcrata' is an adjective modifying 'partit'(party) to describe its political orientation.
El partit demòcrata va guanyar les eleccions.
The democratic party won the elections.
Here 'demòcrata' is an adverbial descriptor describing the manner of the action, derived from the noun form.