Related Clues:

• Thin
• Weak
• Shaky
• Lacking substance
• Uncertain
• Slight
• Flimsy
• Very thin
• Flimsy, as an argument
• Insubstantial
• Lacking a sound basis
• Having little substance or validity.
• Very slight, with little substance or validity
• Very thin in form, having little validity
• Lacking substance or significance