It was a terrible lesson, the hotness in the room was unbearable, we were almost falling asleep with boredom, and our stomachs were rumbling with hungryness. (hot / bored / hungry)
The check-in staff said that the flight was late and apologised for the convenience, although they didn't show much sympathetically. (convenient / sympathetic)
They almost died of thirstiness before they were rescued. (thirsty)
thirstiness = thirst
5
Your calculations are wrong; there are several accuracies. (accurate)
accuracies = inaccuracies
5
We had to measure the length, the wideth and the deepth of the swimming pool, and then measure the hight of the diving board. (long / wide / deep / high)
She experienced a lot of happyness and lonelyness in her lifetime; her parents died when she was still in her youth, her first husband left her, and her only child ran away from home. (happy / lonely / young)