Answer:
1. Blackbird
2. Swordfish
3. Rattlesnake
Step-by-step explanation:
Compound words are words that can be written in three ways. They can be open compounds, or two words (ice cream for example).
Closed compounds which are two words joined to form a single word, (doorknob for example).
They can also be hyphenated compounds, which are two words joined together with a hyphen (long-term for example).