n.
1.
Emptiness, hollowness, triviality, worthlessness, futility, unrealness, unsubstantialness, falsity, vanitas vanitatum .
2.
Conceit, conceitedness, egotism, self-conceit, self-sufficiency, petty pride, self-complacency, self-approbation, self-admiration.
3.
Idle show, vain pursuit, unsubstantial enjoyment, fruitless effort, fruitless desire.