1. (adjective) containing or based on a fallacy

• unsound

2. (adjective) intended to deceive

• deceitful
• fraudulent

1. (adjective) containing or based on a fallacy

• invalid

2. (adjective) intended to deceive

• dishonest
• dishonorable

3. (adjective) based on an incorrect or misleading notion or information

• incorrect
• wrong

1. (adjective) containing or based on a fallacy

• fallaciousness
• fallacy
• false belief
• unsoundness

2. (adjective) intended to deceive

• craftiness
• deceitfulness
• guile
• deceit
• fraudulence
• dupery
• fraud
• fraudulence
• hoax
• humbug
• put-on

3. (adjective) based on an incorrect or misleading notion or information

• fallaciousness