This is the 5054th most frequent Swedish word.
castmans
The word "castmans" does not appear to be a standard Swedish word. Could you mean something else or provide more context?
Here, 'castmans' is used as a possessive form to indicate ownership of the book.
Castmans bok ligger på bordet.
Castman's book is on the table.
In this sentence, 'Castmans' acts as a proper noun referring to a person.
Jag har inte sett någon som är så begåvad som Castmans.
I haven't seen anyone as talented as Castmans.
The word 'Castmans' in this context represents the name of an entity or organization involved in film production.