Bleak means charmless and inhospitable. Its antonym is 'Bright'.

'Deliberate' means intentional. Its antonym is 'Unintentional'.

The antonym of 'Anarchy' is 'Order'.

Alleviate means 'to make suffering less severe'. Its antonym is Aggravate.

Tolerance means 'acceptance'. Given the options, Loathing (intense dislike) is the best antonym.

The antonym of 'Isolation' (the process or fact of isolating or being isolated) is 'Association' (a connection or cooperative link between people or organizations).

Deceitful means 'guilty of or involving deceit'. Its antonym is Sincere.

The antonym of 'Fatigued' (caused to feel exhausted) is 'Energised' (give vitality and enthusiasm to).

The antonym of 'Blocked' is 'Facilitated'.

Demolish means to pull or knock down (a building). Its antonym is 'Build'.

'Delete' means to remove. The antonym is 'Include'.

'Often' means frequently. The antonym is 'Rarely'.

'Flexible' means capable of bending easily without breaking. 'Rigid' means unable to bend or be forced out of shape.

'Gregarious' means fond of company; sociable. The antonym is 'Recluse'.

'Enlightened' means having or showing a rational, modern, and well-informed outlook. The antonym is 'Ignorant'.

Fantastic means extraordinarily good or attractive. Its antonym is 'Ordinary'.

'Zeal' means great energy or enthusiasm in pursuit of a cause or an objective. 'Apathy' is its correct antonym.

'Revelation' means the act of making something known. Its antonym is 'Concealment'.

Conceited means 'excessively proud of oneself'. Its antonym is Modest.

'Cessation' means the fact or process of ending. The antonym is 'Commencement'.