jittery vs jumpy

jittery and jumpy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
jittery	No	Yes	No	No
jumpy	No	Yes	No	No

As adjectives, jittery and jumpy are synonyms defined as:

Other synonyms of jittery include edgy, high-strung, highly strung, nervy, overstrung, restive, uptight.

jittery (adjective)	jumpy (adjective)
characterized by jerky movements	causing or characterized by jolts and irregular movements
being in a tense state	being in a tense state