Bellyache is a term used to describe an unpleasant sensation in the stomach or abdomen, often accompanied by pain. It can be caused by a variety of factors, such as indigestion, food poisoning, or stress. To express this feeling, there are many words that can be used, such as COMPLAINT (9 letters), GRUMBLE (7 letters), GROAN (5 letters), SQUAWK (6 letters), MOAN (4 letters), KVETCH (6 letters), GROUSE (6 letters), CRAB (4 letters), REPINE (6 letters), FUSS (4 letters), GRIPE (5 letters), BEEF (4 letters), WHINE (5 letters), CARP (4 letters), COMPLAIN (8 letters), YAMMER (6 letters), and upsetstomach (12 letters).