perturbation vs hassle

perturbation and hassle both are nouns.

Word	Noun	Adjective	Verb	Adverb
perturbation	Yes	No	No	No
hassle	Yes	No	Yes	No

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

Other hyponyms of perturbation include bother, fuss, trouble, magnetic storm.

perturbation (noun)	hassle (noun)
the act of causing disorder	disorderly fighting
a disposition that is confused or nervous and upset	an angry disturbance
activity that is a malfunction, intrusion, or interruption
(physics) a secondary influence on a system that causes it to deviate slightly
an unhappy and worried mental state

perturbation (verb)	hassle (verb)
	annoy continually or chronically