1. (noun) the property of something weightless and insubstantial

• buoyancy

2. (noun) lightness in movement or manner

• delicacy

1. (noun) the property of something spacious and abounding in fresh air

• capaciousness
• commodiousness
• roominess
• spaciousness

2. (noun) the property of something weightless and insubstantial

• lightness
• weightlessness

3. (noun) lightness in movement or manner

• life
• liveliness
• spirit
• sprightliness

1. (noun) the property of something spacious and abounding in fresh air

• aired
• airy

2. (noun) the property of something weightless and insubstantial

• aerial
• aeriform
• aery
• airy
• ethereal
• airy
• buoyant
• floaty