Submarine parents are those who hover around their children at all times, always trying to protect them and keep them safe from any harm. They can be overprotective and even intrusive, causing their children to feel suffocated and unable to make decisions on their own. Some other synonyms for submarine parents include helicopter parents, lawnmower parents, and tiger parents. Helicopter parents are those who hover above their children like a helicopter, always ready to swoop in and solve any problem. Lawnmower parents are similar to helicopter parents but are more proactive in clearing any obstacles or difficulties from their children's paths. Tiger parents are overly strict and demanding, expecting their children to achieve high levels of success and pushing them to excel in all areas.