Singular and Plural Nouns - Irregular Follow the list;
Uncountable Nouns Often Used Wrongly advice-> advices(wrong) -> a piece of advice, accommodation -> accommodations(wrong);
Easily-Confused Plural - Singular Forms Bacterium(singular) - bacteria(plural), criterion(singular) - criteria(plural), medium(singular) - media(plural);
Weird Plurals in English Bacterium, cactus, lavra, fungus, nucleus, analysis, crisis, thesis, man, woman, child, tooth, foot, sheep and etc...