Collocations for furnished - adj.

fully
The apartment is fully furnished.

partially, partly
beautifully, comfortably, elegantly, expensively, luxuriously, nicely, richly, tastefully, well
His rooms were comfortably furnished.
The villa was expensively furnished throughout.

modestly, simply
a simply furnished room

barely (esp. AmE), sparsely

Furnished is used with these nouns:
accommodation, flat