Puzzles/Word-In-Word

Word-in-word puzzles are word puzzles where the premise of the puzzles is to find words that all contain a certain other word hiding inside. For example, all of the following words should contain the word tri: "Tri" - comes from the Greek word treîs or tría meaning "three / 3" TRI Below are the samples of word-in-word puzzles starting with word tri { |type="{}"} A shape with three straight sides and three angles { triangle | Triangle } { |type="{}"} A sporting event which there are 3 sporting categories: E.G: Running, swimming and cycling { triathlon | Triathlon } { |type="{}"} A vehicle which have one wheel at front and two at back { tricycle | Tricycle | trike | Trike } { |type="{}"} Happening every 3 years { triennial | Triennial } { |type="{}"} A long fork which has 3 sharp points { trident | Trident } { |type="{}"} A group of three related novels, movies { triology | Triology | trilogy | Trilogy } { |type="{}"} A metal stand with three feets to hold up cooking pots to be placed over fire { trivet | Trivet } { |type="{}"} A million million million { trillion | Trillion } { |type="{}"} A set of three children/animals born to same mother at the same time { triplet | Triplet }