I'm an English student (English is not my native language) and I once encountered this word
nowhere, but I first recognized it in that moment as
now + here and I literally pronounced it so.
Maybe my mind was tired, I don't know. But I realized that I've never heard native speakers (in movies, over Skype, in TV channels, and other places) to pronounce it so.
Is there any lingual pattern that makes mind of native-speakers not making mistakes in pronouncing such words, which can be pronounced in two syntactically correct sections?