We don't have synonyms for hi-jack yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are he, pi and i.
(adj) :
Informal spelling of high, often in hyphenated terms. [Physically elevated, extending above a base or average level:]
(n) :
Abbreviation of Hawaii: a state of the United States. [An insular state of the United States, formerly a territory. Capital: Honolulu.]
(n) :
(on some gear levers) Abbreviation of high (“high gear or high range”). [(countable) A high point or position, literally (as, an elevated place; a superior region; a height; the sky; heaven) or figuratively (as, a point of success or achievement; a time when things are at their best, greatest, most numerous, maximum, etc).]
(adj) :
Informal spelling of high, often in hyphenated terms. [Physically elevated, extending above a base or average level:]
(n) :
Abbreviation of Hawaii: a state of the United States. [An insular state of the United States, formerly a territory. Capital: Honolulu.]
(n) :
(on some gear levers) Abbreviation of high (“high gear or high range”). [(countable) A high point or position, literally (as, an elevated place; a superior region; a height; the sky; heaven) or figuratively (as, a point of success or achievement; a time when things are at their best, greatest, most numerous, maximum, etc).]