[kazinator]

"coach" is already the correct noun for someone who coaches; no "er" is required. There is no such word(!), and no such word is necessary; it sounds like the spontaneous creation of a non-native English speaker (or a native one under four years old).

(If "musicoach" is already taken as a name, that doesn't make "musicoacher" viable. Just like you wouldn't name your presentation software "Powerpointer".)

Don't be a goofball(er?) when naming.

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! oxforddictionaries.com does list "coacher" as an Australian word denoting "A docile cow or bullock used as a decoy to attract wild cattle."

[wilkerlucios]

2 reasons

1 - yes, was an spontaneous word from a non-native English speaker (I'm brazilian) 2 - musicoach.com is not available

Even not being tecnically correct I think most people will understand the meaning, good enough for a side project I think, names can always change right?

[zesantos]

also: don't be a goofball(er?) when writing comments

[kazinator]

I think that we can settle this with a friendly game of goofball.