"book" and "compass" as our two unrelated nouns. For the substitution symbol, I propose using the graphic element of an open book to represent a compass needle. The pages of the open book would fan out in a circular pattern, resembling the directional points of a compass, while the spine of the book could represent the central pivot point. This symbol could represent the idea of knowledge and learning guiding one's direction in life, or the concept of exploration through literature and education leading to new discoveries and paths.