piddle vs excrement

piddle and excrement both are nouns.

Word	Noun	Adjective	Verb	Adverb
piddle	Yes	No	Yes	No
excrement	Yes	No	No	No

As nouns, excrement is a hypernym of piddle; that is, excrement is a word with a broader meaning than piddle:

piddle: liquid excretory product
excrement: waste matter (as urine or sweat but especially feces) discharged from the body

Other hypernyms of piddle include body waste, excreta, excretion, excretory product.

piddle (noun)	excrement (noun)
liquid excretory product	waste matter (as urine or sweat but especially feces) discharged from the body

piddle (verb)	excrement (verb)
eliminate urine
waste time; spend one's time idly or inefficiently