• xourse plan,
• vourse plan,
• fourse plan,
• dourse plan,
• ciurse plan,
• ckurse plan,
• clurse plan,
• cpurse plan,
• c0urse plan,
• c9urse plan,
• coyrse plan,
• cohrse plan,
• cojrse plan,
• coirse plan,
• co8rse plan,
• co7rse plan,
• couese plan,
• coudse plan,
• coufse plan,
• coutse plan

The adjective form of "course plan" is "courseplanned".

The plural form of "course plan" is "course plans".

The singular form of the word "course plan" is "course plan". The word remains the same in both singular and plural forms.