well of course.
one is an actual instrument, the other is a term used in many areas not just within music.
still to ask the question "will people listen if i release a synthesiser album"
requires more information.
people could say yes, of course.
then you release something that isn't the same style that they mean by synthesiser music...
you would then be, see you don't listen to synthesiser music, and theyd be yes i do...