The phrase "any nook or cranny" is often used to describe places where something might be hidden or obscure. Some synonyms for this phrase include "every corner and crevice," "all the hiding spots," "every nook and cranny," or "every possible hiding place." Other similar phrases might include "the smallest detail," "the tiniest of spaces," or "every inch of the area." Whatever the phrase used, the meaning remains the same - that every possible location has been thoroughly searched and examined, leaving no stone unturned in the search for something.