import re
rx = r"\b(?:\w*[aeiyouAEIYOU]){3}\w*"
text = "And words with at least 3 vowels are: Obvious, Functionality, looking, directory, application"
print( re.findall(rx, text) )
aW1wb3J0IHJlCnJ4ID0gciJcYig/Olx3KlthZWl5b3VBRUlZT1VdKXszfVx3KiIKdGV4dCA9ICJBbmQgd29yZHMgd2l0aCBhdCBsZWFzdCAzIHZvd2VscyBhcmU6IE9idmlvdXMsIEZ1bmN0aW9uYWxpdHksIGxvb2tpbmcsIGRpcmVjdG9yeSwgYXBwbGljYXRpb24iCnByaW50KCByZS5maW5kYWxsKHJ4LCB0ZXh0KSApCg==