Folks, this article is straight up entitled, “10 Things Nobody Tells You About Shiplap”! I feel like there are probably 100s of Things Nobody Tells Me About Shiplap!
A Thing Related to Shiplap? Tongue and groove - Wikipedia.
“Tongue and groove” is sometimes abbreviated as T&G (for example, on price tags and shelf tags).
Oh, of course there is Larssen sheet piling - Wikipedia!
Larssens are used in foundation pits, coastline strengthening, bridge construction, piers, tide control, flood protection, agriculture irrigation, water reservoir and other work requiring extremely strong support in a narrow geometry.