A thus synonym has to do one of two jobs: link a cause to its result, or show the way something is done. For results, reach for therefore, hence, consequently or plain so. For method, use in this way or thereby. A third, smaller use, thus far, means so far.
Thus is a formal adverb, so it can feel stiff when it crowds a single essay page. Below, each suggested replacement, another word for thus in every case, comes with its formality level, its punctuation and the traps that catch even confident writers.
Swatch at a glance
Best swaps
therefore, hence, consequently, so, as a resultPart of speech
Adverb (a linking or transition word)Most formal
hence, ergo, hitherto, accordinglyMost casual
so, that's whyAntonyms
None. Contrast words such as however do the opposite job.Watch out
Thus cannot join two full sentences with only a comma. Use a period or semicolon before it.Common pattern
thus + verb ending in -ing: prices rose, thus reducing demand
Thus as result versus thus as method
| Job | Swaps | Example |
|---|---|---|
| Result of something | therefore, hence, consequently, so | The bridge closed; therefore, traffic moved to the coast road. |
| Method, in this way | in this way, like this, thereby | Fold the edge twice; in this way, the seam stays flat. |
| Up to now (thus far) | so far, to date, until now | To date, no rival has matched the offer. |
If you are not sure which job your thus does, try the test word: if therefore fits, it is the result sense. If in this way fits, it is the method sense.
How formal is each thus synonym?
Thus swaps climb in formality along our chip strip. So is everyday speech. That's why is friendly and clear. As a result is neutral and works anywhere, from emails to lab reports; it has its own as a result page. Therefore is the classic essay link. Hence tops the five for stiffness; mathematicians, lawyers and scientists favor it.
Ergo, borrowed from Latin, can strike readers as scholarly or slightly tongue-in-cheek, depending on the reader. Use it sparingly.
Punctuation that changes with the word
Thus, therefore and consequently are adverbs, not conjunctions. Joining two complete clauses with them calls for a semicolon or a period.
- Wrong: The data was incomplete, thus we waited.
- Right: The data was incomplete; thus, we waited.
- Also right: The data was incomplete, so we waited.
So is the one swap that can join clauses with just a comma, because it works as a conjunction. Hence has a special trick: it can stand before a noun with no verb at all, as in the storm warning, hence the empty beaches.
Rewrites that cut the repetition
- Thus, the theory fails becomes therefore, the theory fails.
- Sales dropped, thus forcing cuts becomes sales dropped, which forced cuts.
- Thus far, results are good becomes so far, results are good.
- The cells divide thus becomes the cells divide in this way or the cells divide as follows.
- He was late and thus missed the bus becomes he was late and consequently missed the bus.
A student's conclusion reads: "Thus the policy helped farmers, and thus rural incomes grew." Swapping one thus for as a result keeps the logic but removes the echo: "The policy helped farmers; as a result, rural incomes grew."
Thereby, thus and therefore are not interchangeable
Thereby means by that action. Expect an -ing verb right after thereby, as in she signed the lease, thereby committing to a year. You cannot start a new sentence with thereby the way you can with therefore.
Therefore points to a logical conclusion, while thus can also point to a method. So the gears mesh thus works, but the gears mesh therefore does not. Finally, thus never means although or however; those mark contrast, covered on the however synonyms page.
Choosing for your audience
Academic papers: therefore, hence and consequently, spread out so no paragraph uses the same one twice. Business emails: as a result or for this reason read clearly without sounding stiff. Spoken presentations: so or that's why keep listeners with you. A full list of linking words is in the transition words hub.
Frequently asked questions
Hence or therefore: which sounds more formal?
Hence is slightly more formal and more compact. Therefore is the most common link in essays and reads naturally to almost any audience.
Does thus mean the same as so?
In the result sense, yes, but so is casual and can join clauses with a comma. Thus belongs in formal writing and needs a semicolon or period before it.
Starting a sentence with thus: allowed?
Yes. A sentence such as "Thus, the results support the model" is correct. Put a comma after it when it opens a sentence, though short sentences sometimes skip the comma.
Thus far versus so far?
They mean the same thing: up to now. Thus far has a stately, dated ring, so in most emails and reports so far or to date reads better.
Can I swap thus for in conclusion?
Not usually. In conclusion signals the end of a piece, while thus links a result to its cause anywhere in the text. The in conclusion page covers closing phrases.
Can thus be reversed by any single word?
No exact one exists. Linking words like thus lack opposites, but contrast links (however, still, by contrast) do the reverse job of signaling a different direction.