| Dictionary | Name | Region | Valid |
|---|---|---|---|
| Offcl. Scrabble Pl. Dict. & Offcl. Scrabble Words | SOWPODS | International / UK / Australia | YES |
| NASPA Word List 2020 | NWL2020 | USA / Canada / Thailand | YES |
| NASPA Word List 2018 | NWL2018 | USA / Canada / Thailand | YES |
| Tournament Word List 2016 | TWL16 | USA / Canada / Thailand | YES |
| Tournament Word List 2014 | TWL14 | USA / Canada / Thailand | YES |
| Tournament Word List 2006 | TWL06 | USA / Canada / Thailand | YES |
| Tournament Word List 1998 | TWL98 | USA / Canada / Thailand | YES |
| Collins Scrabble Words 2019 | CSW19 | International / UK / Australia | YES |
| Collins Scrabble Words 2015 | CSW15 | International / UK / Australia | YES |
| Collins Scrabble Words 2012 | CSW12 | International / UK / Australia | YES |
| Collins Scrabble Words 2007 | CSW07 | International / UK / Australia | YES |
| Offcl. Scrabble Players Dictionary | OSPD4 | USA / Canada / Thailand | YES |
| Australian Primary Schools | OWL2 | Australia | YES |
| Australian Primary Schools | OWL1 | Australia | YES |
| Words With Friends 2000 | ENABLE2K | Worldwide | YES |
| Words With Friends 1997 (retired) | ENABLE1 | Worldwide | YES |
| Letterpress | Letterpress | Worldwide | YES |
| Yet Another Word List | YAWL | Worldwide | YES |
| Show more | |||
21
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Verb |
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| backfire - come back to the originator of an action with an undesired effect; "Your comments may backfire and cause you a lot of trouble" | ||
| backfire - emit a loud noise as a result of undergoing a backfire; "My old car backfires all the time" | ||
| backfire - set a controlled fire to halt an advancing forest to prairie fire | ||
Noun |
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| backfire - a miscalculation that recoils on its maker | ||
| backfire - a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine | ||
| backfire - a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path | ||
| backfire - the backward escape of gases and unburned gunpowder after a gun is fired |