fo'c's'le
Multiple Entries:fo'c's'le forecastle
Concise Oxford English Dictionary © 2008 Oxford University Press:
fo'c's'le /ˈfəʊks(ə)l/
▶noun variant spelling of forecastle.
Concise Oxford English Dictionary © 2008 Oxford University Press:
forecastle /ˈfəʊks(ə)l/ (also fo'c's'le)
▶noun the forward part of a ship below the deck, traditionally used as the crew's living quarters.
'fo'c's'le' also found in these Oxford entries:

