Cruiseline

4 clues
Carnival, e.g.
Princess, e.g.
Royal Caribbean, e.g.
Royal Caribbean, for one
Similar answers:
Adeline
Adelinemoore
Adelines
Agateline
Ageline
Agelines
Allalongtheline
Alongtheselines
Angeline
Anotioncruise
Aoneliner
Armchaircruise
Baseline
Baseliners
Baselines
Baselinevaseline
Battlecruiser
Battleline
Battlelines
Beatnikoneliner