Not what you asked for, but Welsh has irregular plurals for adults and children, too:
Adult: oedolyn
Adults: oedolion
Child: plentyn
Children: plant
(Still learning, so I'm not too sure why or how)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Not what you asked for, but Welsh has irregular plurals for adults and children, too:
Adult: oedolyn
Adults: oedolion
Child: plentyn
Children: plant
(Still learning, so I'm not too sure why or how)
Always knew Wales was essentially living in a different dimension... ๐ค (lol, thanks for the tidbit!)