Find all of the adjectives in the following sentence and replace them with synonyms.
The large bird flew swiftly in the sky.
The immense bird flew rapidly in the sky.
Complete the following task based on the instruction and optional input provided.### Instruction:
Find all of the adjectives in the following sentence and replace them with synonyms.

### Input:
The large bird flew swiftly in the sky.

### Output:
The immense bird flew rapidly in the sky.