The word is not a valid scrabble word

1 short excerpt of WikWik.org (WikWik is an online database of words defined in the English, French, Spanish, Italian, and other Wiktionnaries.)

• proof␣system n. (Logic) A set of axioms and a set of inference rules which are jointly used to deduce tautologies, thereby…

15 valid words from the definition

AND ARE AXIOMS DEDUCE INFERENCE JOINTLY LOGIC OF RULES SET TAUTOLOGIES THEREBY TO USED WHICH

16 words-in-word (Words found as is inside the word.)

EM OF OO OOF OOFS PRO PROO PROOF PROOFS ROO ROOF ROOFS ST STEM SYSTEM TE

8 words-in-word RTL (Words found written from right to left, inside the word.)

ET FOO ME MET METS OO OOR OR

Scrabble scoring

• Zero, invalid.

• 21 points, without game rules.

Other languages

• Invalid: French German Spanish Italian Romanian

Categories without words

• No anagrams (Word found by changing the order of the letters.)
• No cousins (Word found by changing only one letter.)
• No lipograms (Word found when removing only one letter.)
• No epentheses (Word found when adding only one letter.)
• No suffixes (Word found by adding one or more letters at the end of the word.)
• Not found in the middle (Word found by adding letters in front and at the end of the word.)
• No prefixes (Word found by adding one or more letters in front of the word.)
• No anagrams can be formed with an extra letter (New word formed with all the letters of the word and an extra letter.)
• No anagrams can be formed by removing a letter (New word formed with all the letters of the word minus a letter.)

Recommended websites

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