This dictionary is for word games that are similar to Boggle, with 16 letters on board. So it doesn't have any words longer than 16 letters. Word count: 74,405.
Most other word games like Scrabble are ruined by allowing obsolete / foreign / abbreviated words. Native english speakers don't use these words outside of word games. But if you know them for word games, you just win. Examples:
Everyone knows them but they aren't words: FBI, RBI, ER. They would be fun to use, but if they were allowed you could just play any 3 letters because almost every combination of 3 letters is an abbreviation for something.
❎ No names of places: ENGLAND, SOVIET, NILE.
❎ No names of people: PLATO, MARY, TURK.
❎ No names of products: PEPSI, GOOGLE, BANDAID.
Proper names of plants and animals are allowed to be lower case:
✅ DALMATIAN, SYCAMORE, KINGFISHER
A foreign word can be included if people who only speak english usually know it, and will readily say it while not pretending to be a foreigner or referring to a foreign language/country for effect.
❎ SENORITA, PESO, TSAR.
Only very common foreign foods are allowed. If every foreign food was a word, the game would have millions of words.
✅ BURRITO, SUSHI, BOBA, CURRY.
❎ CARNITAS, NIGIRI, CONGEE, DOSA.
In general, if an abbreviation is more common than the original word, it should be included:
✅ PHOTO (short for PHOTOGRAPH)
✅ FRIDGE (short for REFRIGERATOR)
❎ DOC (short for DOCTOR)
❎ ALT (short for ALTERNATE)
Slang just means not common and only used by certain cool people.
Not allowed if only used by certain age groups:
❎ FLEEK
❎ FLOOZIE
Even if well known, it's not allowed if clearly a slang nickname for the real word:
❎ HUBBY
❎ UNDIES
❎ GINORMOUS
❎ GANGSTA
Most slang words are also abbreviations, so they might not be included even if they became mainstream:
❎ DISS (short for DISRESPECT)
❎ SUS (short for SUSPICIOUS)
❎ THEE
❎ YARE
❎ ELD
❎ YOU'D
❎ SHOULDN'T'VE
❎ CANT
❎ T-SHIRT
❎ X-RAY
❎ XRAY