A good because synonym has to fit the grammar of your sentence as well as its meaning: since, as and given that join a full clause, while due to and owing to sit in front of a noun. Mix those up and the sentence breaks, even though the idea stays the same.
This page sorts every other word for because by the job it does, flags the formal and casual ones, and shows real swaps. It also covers the trap of writing the reason is because. For the other direction, from cause to result, see therefore and so.
Swatch at a glance
Best swaps
since, as, given thatPart of speech
Conjunction (because of is a preposition phrase)Most formal
inasmuch as, owing to, by virtue ofMost casual
cause, cos, seeing asAntonyms
None as such. Although and despite show contrast instead of cause.Watch out
Due to and owing to need a noun after them, not a clause with a verb.
Two grammar slots for each because synonym
Because works in two patterns, and each pattern has its own replacements. Check what follows the word before you swap it.
| Pattern | Replace with | Sample |
|---|---|---|
| because + subject + verb | since, as, given that, seeing that, now that | Since the bus was late, we walked. |
| because of + noun | due to, owing to, on account of, thanks to | The match was called off owing to rain. |
| because + a change that is now true | now that | Now that the roof is fixed, the room stays dry. |
A quick test: if a verb follows, reach for since or as. If only a noun follows, pick a phrase from the second row.
Since, as and for: small words with side meanings
Since is the most natural swap, but it can also mean from that time. The line since he moved, he has been happier could be about time or about cause, so read it twice.
As is light and common in British writing. It can also mean while, so as she was leaving, the phone rang is about timing, not reasons.
For sounds literary or old-fashioned. It cannot open a sentence in this sense, and it always follows a comma: We rested, for the climb had worn us out.
Formal choices for essays and reports
Academic writing tends to favor given that, in view of and owing to. They make the logic sound weighed rather than rushed. Inasmuch as is very formal and means since or to the extent that. Insofar as is a different word: it means to the extent that, so save it for sentences that limit a claim.
Draft: "The trial failed because the sample was too small." Revised: "Given that the sample was so small, the trial could not produce firm results." The second version names the reason first and sounds more measured, which suits a lab report.
The transition and linking words page groups more connectors like these by purpose.
Casual ways to say it
In texts and speech people shorten the word to cause or cos (also spelled 'cause and coz). They are fine with friends and wrong in any graded or professional piece. Seeing as and what with are chatty too: What with the traffic and the rain, I nearly gave up. Being as is regional and best avoided outside speech.
Thanks to is friendly but usually positive. Thanks to the storm can sound sarcastic, which may or may not be what you want.
Before and after: swaps that work
- I stayed home because I was sick becomes I stayed home as I was sick.
- Because of the delay, the shop closed early becomes owing to the delay, the shop closed early.
- We chose this plan because it costs less becomes we chose this plan since it costs less.
- Because the data is limited, we cannot be sure becomes given that the data is limited, we cannot be sure.
- The flight was late because of fog becomes the flight was late due to fog.
- She got the role because of her experience becomes she got the role on account of her experience.
Mistakes to steer clear of
The reason is because repeats itself. Write the reason is that or simply use because once.
Due to plus a clause is a common error: due to it was raining does not work. Write due to the rain or because it was raining. Some strict editors also prefer due to only after a form of be (the delay was due to fog), with owing to used to open a sentence.
So and therefore are not synonyms here. They point from cause to effect, the opposite direction, as do as a result and consequently.
Frequently asked questions
Is it fine to open with because?
It is, provided the full thought is there: Because the bridge was shut, we caught a ferry. The old-school rule against it only warns about fragments like Because it was closed.
Which because swap sounds most formal?
Given that, in view of and owing to are the safest formal picks. Since and as are neutral and fit almost anywhere.
Is since or as better than because?
Neither is better; they are just lighter. Because puts more stress on the reason, so keep it when the cause is the main point of the sentence.
What is another word for because of?
Due to, owing to, on account of and as a result of all take a noun. Thanks to works too but usually sounds positive or sarcastic.
Does because have an opposite?
Not exactly. Words like although, even though and despite show that something happened in spite of a reason, which is the closest contrast.