pitfall

As nouns the difference between pitfall and bacule

is that pitfall is a potential problem, hazard, or danger that is easily encountered but not immediately obvious while bacule is in fortification, a kind of portcullis or gate, made like a pitfall, with a counterpoise, and supported by two large stakes.

As a noun pitfall

is a potential problem, hazard, or danger that is easily encountered but not immediately obvious.

As an adjective antisphexish is

not sphexish; capable, as the higher animals are, of monitoring one's own thought processes and avoiding pitfalls such as infinite loops.