Letdown and Two-by-four

Letdown noun - The emotion felt when one's expectations are not met.

Two-by-four and letdown are semantically related. In some cases you can use "Two-by-four" instead a noun "Letdown".

Two-by-four noun - A timber measuring (slightly under) 2 inches by 4 inches in cross section.

Letdown and two-by-four are semantically related. Sometimes you can use "Letdown" instead a noun phrase "Two-by-four".