1. いかだ   sailboat   raft   airliner   subway   Hint Half-n-half Clue   2. はんせん   subway   sailboat   raft   airliner   Half-n-half Clue   3. たんきてつどう   raft   streetcar, tram   monorail   airliner   Half-n-half Clue   4. ろめんでんしゃ   streetcar, tram   subway   sailboat   monorail   Half-n-half Clue   5. ちかてつ   sailboat   monorail   raft   subway   Half-n-half Clue   6. ていきりょきゃくき   airliner   monorail   sailboat   raft   Half-n-half Clue