R – Raft
A raft of otters.
To remember the collective noun for otters, use the following mnemonic:
After hijacking his raft, the otters took it miles downriver to where they planned to make their new home.
Examples of raft in sentences:
The raft of otters lived in the river.
A raft of otters enjoyed eating fruit.
The entire raft of otters were all excellent swimmers.