に相違ない => without a doubt; certain; sure N2
に[相違「そうい」]ない => No doubt N2
Information, Report
に[違「ちが」]いない => Without a doubt, A N2
Information, Report
と違って => different to N2
Compare
~ といっても間違いない => although I say; although one might say ~ it doesn't matter ... N1
Explain
なければならない/なくてはならない/なければいけない/なくてはいけない/なければだめ/なくてはだめ => must N5
全く~ない => not at all ~ N3
ないでくれ => please don't N4
Ban
くないです => Adjective negation N5
Emphasize the negative meaning
なくして(は)~ない => cannot do without ~ N1
~かいもなく/~がいもなく      => despite; even though ~. I tried hard / hard but unfortunately ~ N1
~べくもない      => cannot possibly be ~. N1