ワンルームマンション

[wanruumu-manshon]

a studio apartment

ワイシャツ

[waishatsu]

a dress shirt

ワーク

[waaku]

a workpiece

This word is used in the field of machining.

ワッペン

[wappen]

an insignia patch, a decorative patch

Note:
"ワッペン" is derived from the German language.