I've been looking for the synonyms (especially poetic ones) referring to the nouns "tear" and "tear-drop". Unfortunately, there wasn't much for me to find. I've found two, poetic ones - "brine" and "lachryma". Are there some other (poetic or even archaic) synonyms?
Waterworks is used as a slang term which means tears or the source of tears.
Though, it is usually used in the idiom turn on the waterworks which means to start crying (especially for a dramatic effect).
Note: Waterworks is also used as a humorous euphemism for the urinary system in British English, so use the word with caution.