Guatemalan/ˌgwahtəʹmahlən/ noun

• acknowledge
• acknowledgment
• a clean sheet/slate
• a clean sweep
• aclinic line
• a closed book
• a close/near thing
• acme
• acne
• acolyte
• aconite
• acorn
• acorn barnacle
• acorn worm
• acoustic
• acoustic impedance
• acoustics
• acquaint
• acquaintance
• acquaintance rape
• acquainted
• acquiesce
• acquire
• acquired characteristic
• acquired immune deficiency syndrome