What is the feminine French word for marron?
There isn't one. You would use "marron", i.e. "des chaussures marron".
Lingerie is a French equivalent of the English word "lingerie". Specifically, the English word is a French loan word. The French word is a feminine noun which may be preceded by the feminine singular definite article la ("the") or the feminine partitive de la ("some"). The pronunciation will be "leh-zhree" in French.