仮かりに

もしN4sense 1
もし is a simple, everyday way to say 'if', while 仮に marks the condition as a deliberate hypothesis, often for argument's sake.
一いち時じ的てき sense 2
一時的 describes something clearly limited in time, while 仮に in its temporary sense implies a tentative arrangement without a fixed duration.
たとえN2sense 1
たとえ pairs with ても to mean 'even if' with a concessive nuance, whereas 仮に can stand alone to set up a pure hypothesis.
暫ざん定てい的てき sense 2
暫定的 is used for official or formal provisional measures, while 仮に is more general and can describe any tentative arrangement.

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とりあえずN2sense 2
とりあえず means 'for now, as a first step' in casual speech, while 仮に stresses that the arrangement is explicitly provisional or unofficial.
もしN5
仮に sets up a hypothetical premise for the sake of argument or discussion, whereas もし is used more broadly for everyday conditional statements.
万まん一いちN3
仮に sets up a hypothetical for the sake of discussion, while 万一 specifically flags the hypothesis as very improbable.

Word family

仮かりにも
(not) even for a moment; (not) on any account; (not) the least bit · at any rate; at the very least; if ... at all

Etymology

From 仮 (kari, 'temporary, provisional') + adverbial particle に (ni). The hypothetical sense developed from the idea of assuming something provisionally.