monkey vs brat

monkey and brat both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkey	Yes	No	Yes	No
brat	Yes	No	No	No

As nouns, brat is a hyponym of monkey; that is, brat is a word with a more specific, narrower meaning than monkey:

Other hyponyms of monkey include holy terror, little terror, terror.

monkey (noun)	brat (noun)
any of various long-tailed primates (excluding the prosimians)	a very troublesome child
one who is playfully mischievous	a small pork sausage

monkey (verb)	brat (verb)
do random, unplanned work or activities or spend time idly
play around with or alter or falsify, usually secretively or dishonestly