• suroat,
• surcot,
• sercoat,
• aur coat,
• zur coat,
• xur coat,
• eur coat,
• wur coat,
• syr coat,
• shr coat,
• sjr coat,
• sir coat,
• s8r coat,
• s7r coat,
• sue coat,
• sud coat,
• suf coat,
• su5 coat,
• su4 coat,
• sur xoat

The adjective form of "sur coat" is "surcoated".

The plural form of "sur coat" is "sur coats"

The singular form of the word "surcoat" remains the same, which is "surcoat"