Push back or pushback? Both are correct -- for different parts of speech.
Write the verb as two words with regular past tense: "push back" / "pushed back." Write the noun as one word: "pushback." And treat the noun as normally uncountable: "some pushback," not "a pushback."
Why this trips up advanced speakers specifically
This spelling split catches even fluent, experienced professionals because the two forms look nearly identical on the page and sound identical out loud. The only signal is spelling and word count -- and spelling errors in exactly this kind of high-register vocabulary read differently than an unrelated typo. Getting it wrong in a written report or Slack message can undercut a professional's perceived fluency and precision, in the exact register meant to project competence.
"The vendor pushed back on the new contract terms."
That's the verb: two words, regular past tense, no ambiguity.
"There has been some pushback on the rollout plan."
That's the noun: one word, uncountable -- like "some feedback," not "a feedback."
Two common errors, plus a third
There are two frequent mistakes. The first is writing the noun as two words: "push back" instead of "pushback," when the sentence is describing resistance received rather than an action taken. The second is treating the noun as countable: "a pushback" instead of "some pushback" or "a concern."
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Lyra Practice teaches advanced non-native professionals the nuance of high-value expressions like this one, then has you practice using them in realistic work scenarios.
Start learning for free →A third, less common error is a hyphenated past tense like "push-backed." The correct past tense is simply "pushed back" -- the verb conjugates normally, it just happens to be a phrasal verb with a particle ("back") that stays put while "push" takes the tense.
A fast test: if you can put "the" or "a" in front of it and it reads oddly ("a pushback meeting" versus "some pushback"), you're probably looking at the noun and it should stay uncountable.
Why the split makes sense once you see the pattern
The verb/noun spelling split is not arbitrary, even though it feels that way at first. English regularly turns a two-word phrasal verb into a single-word noun when the noun describes the result or the state, rather than the action: "back up" becomes "a backup," "break down" becomes "a breakdown," "set up" becomes "a setup." "Push back" follows the identical pattern -- the verb stays two words because it describes an ongoing action, and the noun compresses to one word because it names the resulting thing: the resistance itself.
Once that pattern clicks, the countability rule follows naturally too. "Backup," "breakdown," and "setup" are all typically used as mass or generalized nouns in casual reference ("we need more backup," "there's been a breakdown in communication"), and "pushback" behaves the same way -- it names a quantity or intensity of resistance, not a discrete, countable event.
If you're proofreading your own writing under time pressure, the noun form is worth a specific pass, since it's easy to type the two-word habit from the verb without noticing -- spellcheckers rarely flag "push back" as wrong even when it should be "pushback," because both are individually valid words.
Practice scenarios
Practice using push back in situations like:
- catching a spelling slip before sending a written status report
- correcting 'a pushback' to 'some pushback' in your own draft
- conjugating the verb correctly under time pressure in a live meeting
Useful practice phrases:
- "[Someone] pushed back on..."
- "There has been some pushback on..."
- "We're expecting pushback from... on..."