Laser and Two-by-four

Laser noun - An acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light.

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

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

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