• Flat abdomen
• Flat as a pancake
• Flat as ditchwater
• Flat baseplate
• Flat battery
• Flat billed
• Flat bottomed
• Flat bread
• Flat fee
• Flat griddle
• Flat iron straightener
• Flat land
• Flat landscape
• Flat macule
• Flat midriff
• Flat on (someone's) back
• Flat out
• Flat peen hammer
• Flat rate
• Flat refusal