Synonyms For So: 40+ Words (Therefore, Very, Thus)

“So” is the hardest-working word in English — conjunction, adverb, intensifier, filler. “So tired,” “so we left,” “so do I,” “so that…” One tiny word, five jobs. No wonder writers overuse it: it’s the duct tape of sentences. The synonyms below split “so” by job — therefore, very, thus, likewise — so each use gets its precise word.

This guide gives you 40+ synonyms for “so,” grouped by use — plus writing tips, formal vs casual picks, and FAQs.

The Five Jobs of “So”

“So” works as therefore (so we left), very (so tired), thus/in this way (do it so), also (so do I), and purpose (so that we finish). Merriam-Webster’s thesaurus entry for so covers its adverbial senses. Identify the job first — then pick the synonym.

40+ Synonyms for So (Grouped by Use)

Flat illustration of an arrow pointing from cause to effect

Therefore and Consequently

Therefore — therefore, we left.
Thus — thus ended the meeting.
Consequently — consequently delayed.
Accordingly — plan accordingly.
Hence — hence the delay.
As a result — as a result, sales rose.
That’s why — casual. that’s why we left.
Which is why — which is why it failed.
Ergo — playful formal. ergo, we rest.
For that reason — for that reason, we object.
On that account — formal. on that account, he resigned.

Very and Extremely

Very — very tired.
Extremely — extremely busy.
Highly — highly unlikely.
Truly — truly remarkable.
Really — really good.
Quite — quite certain.
Remarkably — remarkably calm.
Exceptionally — exceptionally bright.
Incredibly — incredibly fast.
Super — casual. super excited.
Tremendously — tremendously helpful.
Awfully — casual British. awfully nice.

In This Way and Thus

Thus — thus it was done.
In this way — hold it in this way.
Like this — do it like this.
As follows — the rules are as follows.
In such a manner — formal. behave in such a manner.
After this fashion — formal. proceed after this fashion.

Also and Likewise

Also — she also came.
Likewise — likewise, he agreed.
Too — me too.
As well — him as well.
Similarly — similarly affected.
Besides — besides, he agreed.

So That and In Order To

So that — leave early so that we arrive.
In order to — in order to succeed.
To — to finish on time.
For the purpose of — formal. for the purpose of clarity.
With the aim of — with the aim of winning.
With a view to — formal. with a view to improving.

More connector vocabulary in our Synonyms category — see synonyms for but and synonyms for also.

“So” Through History: From Old English to Filler Word

“So” has been working hard for over a thousand years:

Old English “swā”: meant “in this way, thus” — the manner sense came first.
Middle English: picked up the “therefore” sense — “swā we left” became “so we left.”
Shakespeare’s “so”: “so” as intensifier was already everywhere — “so fair, so sweet.”
Modern filler: “So,” at the start of answers exploded in the 2000s — linguists call it a discourse marker, signaling “I’m about to explain.”
“Sooooo”: the stretched spelling in texts adds emphasis the word itself lost through overuse.

The word’s journey — from precise manner adverb to universal filler — is exactly why it needs synonyms now. A thousand years of service earned it a rest.

Breaking the “So” Habit in Writing

“So” is the most overused word in casual writing. Fix it:

Count your “so”s: search your draft — most “so”s can be deleted or upgraded.
“So” as filler: starting sentences with “So,” adds nothing — cut it. “So, the results show…” → “The results show…”
“So very”: never write “so very” — pick one intensifier or none.
Vary the connectors: rotate therefore, thus, consequently, as a result — your paragraphs will breathe.

Formal vs Casual Picks

Formal-safe: therefore, thus, consequently, accordingly, hence, ergo, in such a manner, for the purpose of. Neutral: so, very, extremely, also, likewise, similarly, in order to. Casual: really, super, that’s why, like this, me too. “Ergo” suits playful essays; “super” suits texts.

Common Mistakes to Avoid

“So” overload: three “so”s in one paragraph is two too many — vary or cut.
Comma after “so”: “So we left” (no comma) vs “So, what happened?” (comma for the discourse marker). Different “so”s, different rules.
“So… that” vs “such… that”: “so tired that” (adjective) vs “such a day that” (noun phrase). Don’t swap them.
“So fun” grammar: traditionalists insist on “so much fun” — “so fun” is now standard in speech but still flagged in formal writing.

FAQs About Synonyms for So

What is the best synonym for “so”?

“Therefore” for conclusions, “very” for intensity, “thus” for manner, “also” for addition, “in order to” for purpose. The job picks the word.

What is a formal word for “so”?

“Therefore,” “thus,” “consequently,” and “accordingly” are the most formal. “Ergo” adds classical flair.

Is it okay to start a sentence with “So”?

In speech and casual writing, yes. In formal writing, prefer “therefore,” “thus,” or restructure — starting with “So,” reads as conversational.

What can I use instead of “so very”?

Just “very” — or upgrade: “extremely,” “remarkably,” “exceptionally.” “So very” is always redundant.

What is the opposite of “so” (as in therefore)?

There’s no direct opposite — but “nevertheless,” “however,” and “still” reverse the logical direction.

Why do people say “so” at the start of sentences?

It’s a discourse marker — it signals “I’m organizing my thoughts” or “here comes the explanation.” Harmless in speech; cut it in formal writing.

Final Thoughts

“So” is five words wearing one disguise — the connector, the intensifier, the pointer, the adder, the purpose-marker. Unmask it, give each job its precise word, and your sentences will stop leaning on the crutch and start standing on their own.

Synonyms for So: 40+ Alternatives for Every Use (2026 Guide)

The Five Jobs of “So”