In IELTS, using uncommon words correctly can significantly boost your score, but overloading your writing with overly complex or unrelated terms will harm your performance. Uncommon words must be directly related to the task at hand. For example, in a graph describing economic trends, words like “expenditure,” “revenue,” and “profit margins” are appropriate. In contrast, using complex academic words unrelated to the topic (e.g., “subliminal,” “dichotomy”) might seem impressive but are irrelevant and inappropriate for the task.

When dealing with numerical data or trends, incorporating less common but relevant words or phrases can showcase your vocabulary knowledge. Here are examples of uncommon words used correctly in Task 1:

• Fluctuate: Instead of repeatedly using “change,” use “fluctuate” to describe erratic data.
• Peak: For a sharp rise followed by a decline, using “peak” can add precision.
• Plateau: Describing a period where data remains constant with “plateau” adds depth compared to saying “remained the same.”
• Plummet: Rather than stating “a sharp decrease,” you can use “plummet” for dramatic drops in data.

It’s also important to use natural-sounding phrases and collocations. For example, instead of saying “went up a lot,” you can write “experienced a substantial increase.” These types of phrases sound more sophisticated and show a higher level of language proficiency.