das Mobiliar
furnishings
All the furniture and furnishings in a room, apartment, or building.
Das Büro wurde mit komplett neuem Mobiliar ausgestattet.
The office was equipped with completely new furnishings.

furnishings
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furnishings
All the furniture and furnishings in a room, apartment, or building.
Das Büro wurde mit komplett neuem Mobiliar ausgestattet.
The office was equipped with completely new furnishings.

'Das Mobiliar' (the furnishings) is a collective term for all the pieces of furniture in a building. The word is used only in the singular and has no plural form.
Das gesamte Mobiliar der alten Villa wurde verkauft.
All the furnishings of the old villa were sold.
Although 'Mobiliar' (furnishings) refers to many individual objects, grammatically it is a singular noun. The associated verb is therefore also singular.
Das Mobiliar in diesem Hotel ist sehr altmodisch.
The furnishings in this hotel are very old-fashioned.
The word 'Mobiliar' (furnishings) is more formal than the plural 'die Möbel' (furniture). It is often used in official contexts such as rental contracts, insurance, or real estate.
Der Wert des Mobiliars muss für die Versicherung geschätzt werden.
The value of the furnishings must be estimated for the insurance.
furnishings / institution / setup
'die Einrichtung' and 'das Mobiliar' both have to do with the objects in a room. 'Einrichtung' is a bit broader and often refers to the whole style of a room: furniture, lamps, rugs, and other things together. 'Mobiliar' mainly refers to the furniture and furnishings themselves. It sounds somewhat more formal and is often used when talking about the furniture present in a building. If you are describing the style of a home, 'Einrichtung' fits better. If you mean the furniture as inventory or property, 'Mobiliar' is more precise.

Das alte Mobiliar im Wartezimmer wird nächste Woche ausgetauscht.
The old furnishings in the waiting room will be replaced next week.
Mein Kollege mag die Einrichtung des Besprechungsraums, weil sie ruhig und freundlich wirkt.
My colleague likes the furnishings in the meeting room because they feel calm and welcoming.