There are a number of possible meanings for the abbreviation TWL. Some of these include Tournament Word List, The Weakest Link, Total Weight Loss and Top Water Level.
It's in the Scrabble dictionary, (a.k.a. TWL, the Wordlist). Here's your proof: grep ^piu$ twl piu
The TWL (the Scrabble dictionary) has these 19 words:aristocracyautocracydemocracygerontocracygynecocracyisocracymeritocracymobocracymonocracyochlocracypantisocracyplantocracyplutocracyslavocracystratocracytechnocracythalassocracytheocracytimocracy
From the TWL, (the Scrabble dictionary):pulsar
459, using the TWL, (the Scrabble dictionary).
From the TWL, (the Scrabble dictionary):bethornbotcherbouncerbrotherburthenbutcherchortenchufferchunterchurnercoffretconfutecornutecothurncountercourtercouthercroftercurrentforerunfortunefronterfrotherfrouncefunctorfurtherfuthorchorrentnorthernotcherrecountrefrontretouchtouchertroffertrounceturnoff
Eleven can be found in the TWL (the Scrabble dictionary):himkaddishimmashgichimmashgihimmidrashimseraphimshammashimshimtallithimteraphimwhim
These are from the TWL (the Scrabble dictionary):apocarp arcuatecapturecartagecouragecuracaocuracoaoutpaceoutraceoutrageparapetpeacoatportageprecoup
From the TWL (the Scrabble dictionary):cedingceringchiderchieldchildechinedcindercithercleridclientcreditcretincringedekingdelictdelticdentildetickdickerdingerdingledirectditherdreichdreighdrenchdrieghechingengildengirdengirtenrichethnicgentilgildergirdlegirnedgirtedgliderglitchgrinchherdichiltedhinderhingedhingerhintedhinterinchedincheritchedkilnedkiltedkilterkinderkindlekingedkirnedkirtlekithedknightlectinlengthlenticlichenlickedlickerlingerlinkedlinkerlintedlinterlithernichednickednickelnickernicklenidgetnighednigherredingregildregiltreknitrelictrelinkrichenrickedridentridgelringedthricetickedtickertickletindertingedtingletinkertinkletirledtrenchtricedtrined
A total of 46 can be made, usingthe TWL (the Scrabble dictionary):ababetableaealalbalealtatatebabalbalebatbatebebeatbelbeltbetbetablaeblatblatebleatbleteateletetalalablatlatelealettatabtabletaetaeltaleteatealteltela
Using the TWL, (the Scrabble dictionary), these are the possibilities:actress addressaddrestaspectscarpetscastersdepartsescarpspaddersparsecspasterspetardspreactsprecastprecastsrecastsredactsredcapsrepastssaddestscarpedscartedscrapedscrapessecparsspacersspaderssparestspectraspreads
At least 90. These are from the TWL, (the Scrabble dictionary)bedbugbeduinbeginsbeingsbiblesbiddenbieldsbilgedbilgesbindlebingedbingesblendsblindsbludgebluingblungebuddlebudgedbudgesbudgiebugledbuglesbuildsbulbedbulgedbulgesbundlebungedbunglebusiedbusingdebugsdeignsdesigndibbeddibbledindledingeddingesdingledingusdisbuddubbeddubbindudingdungedebbingengildgeniusgibbedgildedglidedglidesguidedguidesguildsguiledguilesguisedguldengunselinduedinduesingleslubinglungedlungeslungisluniesnibbednibblenubblenubilenudgednudgesnudiessexingsidledsignedsingedsinglesludgesluingsubbedsubdebsuddenugliesundiesunisex