trembles vs milk sickness

trembles and milk sickness both are nouns.

Word	Noun	Adjective	Verb	Adverb
trembles	Yes	No	No	No
milk sickness	Yes	No	No	No

As nouns, trembles and milk sickness are synonyms defined as:

trembles and milk sickness: disease of livestock and especially cattle poisoned by eating certain kinds of snakeroot

trembles (noun)	milk sickness (noun)
disease of livestock and especially cattle poisoned by eating certain kinds of snakeroot	caused by consuming milk from cattle suffering from trembles
	disease of livestock and especially cattle poisoned by eating certain kinds of snakeroot