Exaggeration means to make something seem bigger, worse, or more important than it actually is. It involves saying or describing things in a way that makes them exaggerated or exaggeratedly expressed. Full definition
Animals (and people) faced with stress often react with exaggeration of common activities they find pleasurable and comforting. (2ndchance.info)
It's not exaggeration to say that without her continuous and genuine help, I wouldn't have been able to accomplish many things in my blogging journey. (aikaslovecloset.com)
Just in case, I should also point out the use of slight exaggeration for effect. (firstthings.com)