jumpy

Adjective

Synonyms: edgy high-strung highly strung jittery nervy overstrung restive uptight rough rocky bumpy jolty

WordNet 3.0

Adjective (2)

being in a tense stateSynonyms: edgy high-strung highly strung jittery nervy overstrung restive uptight
causing or characterized by jolts and irregular movements“a rough ride”Synonyms: rough rocky bumpy jolty jolting

Webster's Dictionary (GCIDE)

Jumpy \Jump"y\, a. [Compar. Jumpier; superl. Jumpiest.] Jumping, or inducing to jump; characterized by jumps; hence, extremely nervous; jittery.

Syn: edgy, fidgety, high-strung, in suspense(predicate), jittery, nervous, nervy, overstrung, restive, uneasy, uptight. [Webster 1913 Suppl. WordNet 1.5]