In Thursdays " IELTS Writing Task 1: nouns and verbs " I suggested that you should avoid using words like soar, rocket and plummet when describing changes on a graph or chart. I explained that these words exaggerate too much, and that they are not academic.
But someone asked this sensible question:
How can we get a high score for lexical resource (vocabulary) if we only use common words like increase, rise and fall?
The quick answer is that its better to use less common vocabulary for other aspects of your description. If you analyse " IELTS Writing Task 1: bar chart essay " band 9 essay, youll see that I used common words like rose, decreased, reaching and dropped to describe changes, but I managed to use less common vocabulary for other aspects of my description e.g. global turnover, devices, namely, platform.