What does noninterchangeable mean in crosswords?

noninterchangeable means: such that the terms of an expression cannot be interchanged without changing the meaning

How many letters does noninterchangeable have?

noninterchangeable has 18 letters.

Word entry · 18 letters

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18 lettersPart of speech adjectiveSorted aabceeeghilnnnnortStarts with NEnds with E0 clues

1N2O3N4I5N6T7E8R9C10H11A12N13G14E15A16B17L18E

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N_________________

such that the terms of an expression cannot be interchanged without changing the meaning

From non- + interchangeable.

Source: Wiktionary, CC BY-SA 4.0

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