Synonyms for By:

adj.

near (adjective)
adjacent, along, close, hairbreadth, immediate, local, near, nearby, neighborhood, proximate, at, next.

adv

near (adverb)
along.

adv.

all (adverb)
aside, away, past.
near (adverb)
aside, away, beyond, close, over, past.

n.

aboard, afloat, board, bookable, booking, bus, Booking office, ARR, aisle seat, book on. about, across, ahead, along, beyond, on, over, Via. alongside, attached, next door, united, Beside, next to. above, advanced, average, classical, classically, exacting, high, low, standard. depending on, strictly speaking, under, according to, in accordance with, in the eyes of the law/world etc., on a case-by-case basis, on (someone's/something's) merit. after, assignment, initial, junior, nameless, namesake, nee, Of, naming ceremony. all, before, here, last, sometime, then, when, This, Until, Whenever. throughout, within, During, for the duration, in the midst of something. disproportionate, double, full-size, isometric, life-size, so, three-quarter, That. by (noun)
aside, away, bye, incident, incidental, past, side.

prep.

alongside (preposition)
next to.
by means of (preposition)
on, Via.
next to (preposition)
along, alongside, near, nearby, Beside.

Other synonyms:

across, before, beyond, disproportionate, here, initial, life-size, nameless, namesake, nee, next, three-quarter, throughout, Beside, This, Until, Via, according to, naming ceremony. after, ahead, full-size, isometric, junior, on, over, under. That. so, within. Of. about. double. position
at.
Other relevant words:
aboard, about, across, after, ahead, along, alongside, aside, at, attached, away, before, beyond, bye, double, here, incident, incidental, isometric, junior, nameless, namesake, on, over, past, side, three-quarter, Beside, During, Of, That, This, Until, Via, according to, next to, in accordance with.

Usage examples for by

  1. By the way, do you ever see Mr. Rigby? – Jane Cable by George Barr McCutcheon
  2. Good- by Willum; I'll do as well as I can by her. – Uncle William The Man Who Was Shif'less by Jennette Lee
  3. By that time- well, we shall see what we shall see. – The Princess Virginia by C. N. Williamson A. M. Williamson