ump

In lang=en terms the difference between jump and ump

is that jump is to increase the height of a tower crane by inserting a section at the base of the tower and jacking up everything above it while ump is to act as an umpire.

As verbs the difference between jump and ump

is that jump is to propel oneself rapidly upward, downward and/or in any horizontal direction such that momentum causes the body to become airborne while ump is to act as an umpire.

As nouns the difference between jump and ump

is that jump is the act of jumping; a leap; a spring; a bound or jump can be a kind of loose jacket for men while ump is (baseball) an umpire.

As an adverb jump

is (obsolete) exactly; precisely.

As an adjective jump

is (obsolete) exact; matched; fitting; precise.