Common AI Words and Phrases (and What to Write Instead)

Words like delve, tapestry, testament, pivotal, realm, seamless and phrases like it's important to note show up far more often in AI-generated text than in everyday writing. None of them is wrong, but in clusters they make writing sound generic and machine-made. The fix is simple: swap them for plainer, more specific words, and cut phrases that only fill space.

ZeroTell publishes this blog and builds a humanizer that targets these patterns, so we spend a lot of time looking at them. Here's what we've learned about spotting and replacing them.

Why AI models lean on certain words

Language models choose words by predicting what's likely to come next. Their training and later fine-tuning push them toward text that sounds polished, balanced and helpful. That combination favors a particular vocabulary: slightly formal, slightly grand, often abstract.

A person might write "this matters." A model is more likely to write "this plays a pivotal role." Both are fine once. Repeated across a document, the second style starts to feel like a press release.

There's also a feedback loop. Once readers noticed words like delve, they started to associate them with AI, which makes those words stand out even when a human uses them.

The most common AI words, with plain alternatives

Here's a working list. The alternatives aren't always one-to-one; often the best fix is to say something more specific.

The most common AI phrases

Phrases are often bigger tells than single words, because they add length without meaning.

Filler openers

• In today's fast-paced world
• In the ever-evolving landscape of
• When it comes to

Fix: delete them and start with your point.

Signposting that announces instead of saying

• It's important to note that
• It is worth noting that
• It's essential to understand that

Fix: if it's important, just say it. "Note that the deadline moved" becomes "The deadline moved."

Heavy transitions

• Moreover, Furthermore, Additionally at the start of sentence after sentence
• In conclusion, Ultimately, Overall before a summary that repeats the paragraph

Fix: use "also," "and," "but," or no transition at all. Good paragraphs flow from their logic, not from connectors.

Balanced hedging

• While X is true, it's also important to consider Y
• This is not just about X, it's about Y

Fix: take a position. If both sides matter, say which matters more and why.

Grand closers

• ...paving the way for a brighter future
• ...a testament to the power of
• ...in an increasingly interconnected world

Fix: end on a concrete fact, a next step, or an honest limitation.

Patterns beyond vocabulary

Swapping words helps, but some AI tells are structural. Watch for:

• Rule of three everywhere. "Fast, reliable, and scalable." One list of three is fine. Every sentence with three items isn't.
• Uniform sentence length. Paragraphs where every sentence is 18 to 22 words feel flat. Mix short and long.
• Every paragraph ends with a summary. Let some paragraphs end on the evidence.
• Colon-heavy headings and bold lead-ins in every section.
• No specifics. No names, numbers, places or examples. Generic text could be about anything.
• Even-handed to a fault. Real writers have opinions and say so.

A before-and-after example

Before:

In today's rapidly evolving educational landscape, it's important to note that technology plays a pivotal role in fostering student engagement. Moreover, digital tools can seamlessly enhance the learning experience, serving as a testament to the transformative power of innovation.

After:

When our school gave every ninth grader a tablet, homework completion went up in some classes and down in others. The difference wasn't the device. It was whether teachers used it for something students couldn't do on paper.

The second version is shorter, specific, and says something. It also contains none of the flagged words, not because we banned them, but because specific writing doesn't need them. (The example school is illustrative.)

AI HumanizerRewrite AI text so it reads naturally

How to edit AI-heavy text quickly

If you're revising a draft that leans on these words, whether it's your own or AI-assisted where that's allowed, work in this order:

1. Cut filler openers and closers. Often the first and last sentences of each paragraph.
2. Replace grand words with plain ones from the table.
3. Add one specific detail per paragraph: a number, name, example or source.
4. Vary sentence length. Break one long sentence into two; join two short ones.
5. Take a position where the text sits on the fence.
6. Read it aloud. Your ear catches what your eye skips.

A humanizer or paragraph rewriter can speed up steps 2 and 4, but steps 3 and 5 need you, because only you know the specifics and what you actually think.

Words that depend on context

Some words only become tells in certain settings. "Landscape" is perfectly normal in a geography paper and in a gardening blog. "Navigate" is literal in a sailing guide. "Robust" is a standard technical term in statistics and engineering.

The question is always whether the word is doing precise work. In a statistics paper, "robust" names a specific property, so keep it. In a product description, "robust solution" usually means nothing specific, so replace it with what the product actually does.

The same goes for academic writing in general. Formal registers naturally use more abstract vocabulary, and that's fine. What makes academic AI text stand out isn't formality; it's formality without substance: sentences that sound scholarly but don't commit to a claim, cite a source, or mention a finding.

A quick self-test

For any sentence you suspect, try deleting the suspect word or phrase. If the sentence still says the same thing, the word was filler. If the meaning breaks, ask whether a plainer word would carry it just as well.

Don't overcorrect

Two cautions. First, a human who naturally writes "crucial" or "foster" isn't writing like AI. These are normal English words. Don't strip every one from your vocabulary out of fear.

Second, avoiding these words isn't a way to hide AI use. Detectors look at broader patterns, and instructors look at content and process. The point of this list is clearer writing. If your course or workplace has rules about AI, follow them and disclose when required. For more on how detection actually works, see how AI detectors work.

Key takeaways

• Words like delve, pivotal, seamless and testament are fine alone but signal generic writing in clusters.
• Filler phrases ("it's important to note") are bigger tells than single words. Delete them.
• Structural habits matter too: rule of three, uniform sentences, summary endings, no specifics.
• The best replacement for a vague word is usually a specific detail.
• Edit for clarity and honesty, not to game a detector.

Pick a paragraph you wrote recently, search it for the words in the table, and rewrite just those sentences. You'll likely find they were the weakest ones.