difference, distinction, discrepancy...

breaking (a contract, promise, etc.)

sure, no mistaking it, for certain...

sure, no mistaking it, for certain...

illegal, illicit, unlawful

madness, madman, enthusiast...

out-of-place, inappropriate, sticking out like a sore thumb...

difference, discrepancy, variation

to differ, to be different, to run counter to...

unconstitutionality

alternate, alternation

mistake, error, blunder...

difference, disagreement, conflict...

difference, disagreement, conflict...

difference, disagreement, conflict...

misunderstanding, mistaken idea, wrong guess

to not match well (e.g. at the seams), to not mesh properly (of gears), to differ (e.g. of opinions)...

to not match well (e.g. at the seams), to not mesh properly (of gears), to differ (e.g. of opinions)...

crossing without meeting (e.g. letters in the post, people on the road), going astray...

to be mistaken, to be incorrect, to be wrong...

mistaking one person for another, (case of) mistaken identity

to mistake (for something or someone else), to be unable to recognize

to make a mistake (in), to commit an error, to get wrong...

difference, disparity, gap

to not match well (e.g. at the seams), to not mesh properly (of gears), to differ (e.g. of opinions)...

crossing without meeting (e.g. letters in the post, people on the road), going astray...

uncomfortable feeling, feeling out of place, sense of discomfort...

diagonal, oblique, brace

cramp, sprain, crick...

breach of contract, default