same word, different pronunciation and language.
Due to my limited exposure to Japanese, yes, I cannot truly comment on the lyrical style Nightmare uses throughout Livid. Yet I can still say the music is pretty darn catchy and lively. The lyrics seem to flow nicely and the vocals are quite nice. No complaints.
The two or so anime fans who read my blog may recognize Nightmare as the band that provided "The World" and "Alumina" as opening/ending themes for the first half of the Death Note series. Despite the songs' reputations for being deemed "emo J-pop" and my barely lasting to episode 20, I found Nightmare far more interesting than Maximum the Hormone. That or iTunes had their music and I liked what I heard from the samples.
Either way, the Japanese come up with really bizarre band names. @_@