1. (adjective) lacking substance or significance

• flimsy
• fragile
• slight
• thin

1. (adjective) having thin consistency

• thin

2. (adjective) very thin in gauge or diameter

• thin

3. (adjective) lacking substance or significance

• insignificant
• unimportant

1. (adjective) having thin consistency

• low density
• rarity
• tenuity

2. (adjective) very thin in gauge or diameter

• slenderness
• tenuity
• thinness

3. (adjective) lacking substance or significance

• feebleness
• tenuity
• pettiness
• puniness
• slightness
• triviality
• spareness
• sparseness
• sparsity
• thinness