raft (n.1) Look up raft at Dictionary.com
"floating platform," late 15c., originally "rafter" (c.1300), from a Scandinavian source such as Old Norse raptr "log" (Old Norse -pt- pronounced as -ft-), related to Middle Low German rafter, rachter "rafter" (see rafter).
raft (n.2) Look up raft at Dictionary.com
"large collection," 1830, variant of raff "heap, large amount," from Middle English raf (compare raffish, riffraff); form and sense associated with raft (n.1).
raft (v.) Look up raft at Dictionary.com
1680s, from raft (n.1). Related: Rafted; rafting.