dolĉaĵo

-Aĵ- is the suffix that makes an abstraction into an object you can hold.Dolĉa is the quality, sweet. Dolĉaĵo is a sweet thing: a specific edible article, in the plural the bag of them a child is given after dinner. The same suffix runs right through the language and it is worth collecting the pattern rather than the words - nova gives novaĵo, a piece of news; bela gives belaĵo, a beautiful thing; manĝi gives manĝaĵo, food; konstrui gives konstruaĵo, a building. One suffix, four English nouns that share nothing.

British and Esperanto agree on the shape of this word, and American English does not. A dolĉaĵo is a sweet in the countable British sense, and dolĉaĵoj is what a sweetshop sells. American candy is a mass noun and does not pluralise the same way, which is exactly the sort of mismatch a neutral language is supposed to sidestep - and here it does, because the -aĵ- construction is countable by design.

Not the whole dessert. Deserto is the course at the end of the meal, kuko is a cake, bombono is a boiled sweet or a chocolate, and sukeraĵo overlaps with dolĉaĵo but leans on sukero specifically. Dolĉaĵo is the broadest of them: anything sweet, made to be eaten on its own.