This has been confusing me for a couple of days, maybe it's because I just started self teaching physics (which isn't going so well lol) So entrainment is when one vibrating object begins resonating to the same rate as the more powerful, higher vibrating object. Resonance is when one vibrating object causes another vibrating object with the same resonant frequency, to vibrate. Isn't is basically the same thing? or are the terms used interchangeably? Oh and as an added question (i'm sorry) are the terms 'oscillating' and 'vibrating' used interchangeably?