jittery vs highly strung

jittery and highly strung both are adjectives.

Word	Noun	Adjective	Verb	Adverb
jittery	No	Yes	No	No
highly strung	No	Yes	No	No

As adjectives, jittery and highly strung are synonyms defined as:

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

jittery (adjective)	highly strung (adjective)
characterized by jerky movements	being in a tense state
being in a tense state