Word Study
in passing
THESAURUS
in passing
a propos, along the way, amain, apace, apropos, apropos of, as one goes, at once, by forced marches, by the by, by the way, cursorily, en passant, en route, expeditiously, feverishly, for example, furiously, hand over fist, hastily, helter-skelter, hotfoot, hurriedly, hurry-scurry, immediately, in mid-progress, in transit, in transitu, incidentally, instantly, on the road, on the run, on the way, on the wing, par exemple, parenthetically, pell-mell, promptly, quickly, slapdash, speaking of, speedily, superficially, swiftly, with a rush, with all haste, with dispatch, with hasteFor further exploring for "in passing" in Webster Dictionary Online