[1] : WordNet (r) 2.0

bob up
     v : originate or come into being; "aquestion arose" syn: arise,
          come up
see also:
arise come up 

[2] : Moby Thesaurus II by Grady Ward, 1.0

74 moby thesaurus words for "bob up":
   accomplish, achieve, appear unexpectedly, approach, arrive,
   arrive at, arrive in, attain, attain to, be received,
   be unexpected, blow in, break forth, break water, burst forth,
   check in, clock in, come, come in, come to, come to hand,
   come unawares, come upon, creep up on, debouch, erupt, fall upon,
   fetch, fetch up at, find, flare up, flash, flash upon one,
   float up, fly up, fountain, gain, get in, get there, get to, gleam,
   gush, hit, hit town, irrupt, jet, jump up, leap up, make, make it,
   pop up, pounce upon, pull in, punch in, reach, ring in, rocket,
   roll in, shoot up, show up, sign in, skyrocket, spring up, spurt,
   start up, surface, time in, turn up, upleap, upshoot, upspear,
   upspring, upstart, vault up

Ball Up >> B Words
Ball Up, definition of term: Ball Up
ball+up_pag1.html

Bang Up >> B Words
Bang Up, definition of term: Bang Up
bang+up_pag1.html

Backed Up >> B Words
Backed Up, definition of term: Backed Up
backed+up_pag1.html

Back Up >> B Words
Back Up, definition of term: Back Up
back+up_pag1.html

Ante Up >> A Words
Ante Up, definition of term: Ante Up
ante+up_pag1.html

Act Up >> A Words
Act Up, definition of term: Act Up
act+up_pag1.html