Formal:
* Apparel: This is the most common and formal word for clothing.
* Habilment: This is a slightly more archaic term, often used in literature or historical context.
Informal:
* Outfit: This refers to a complete set of clothing worn together.
* Attire: This is another general term for clothing, often used in formal settings.
Specific:
* Workwear: Clothing worn for work.
* Sportswear: Clothing designed for athletic activities.
* Underwear: Clothing worn beneath other garments.
* Outerwear: Clothing worn over other garments, like jackets or coats.
Ultimately, the best compound word will depend on the specific context of your writing or conversation.