The ornamental design for a combinationarmoire, as shown and described.
FIG. 1 is a closed front right perspective view of a combination armoire showing my new design;
FIG. 2 is an open front right perspective view thereof;
FIG. 3 is an open front left perspective view thereof;
FIG. 4 is an open front view thereof;
FIG. 5 is an open rear view thereof;
FIG. 6 is an open top view thereof;
FIG. 7 is an open bottom view thereof;
FIG. 8 is an open left side view thereof; and,
FIG. 9 is an open right side view thereof.
The broken line showing of a combination armoire is included for the purpose of illustrating portions of the article that form no part of the claimed design.