They earned a large sum of money that day.
The fact that the sum of money is large depends upon the experience of the person that earned it that day. For someone who usually earns $10/day that large sum of money could be $40. For another, a days earnings might not be considered large until it's $400.
That happened really fast! The actual speed of what is being described as fast is not going to be the same depending on the realm that is being dealt with. For example, the scales for fast are not the same for chemistry as they are for the development life cycle of automobiles.
Other examples of these kinds of words:
I have read some definitions on 'Deixis' but from what I've read it doesn't seem to encompass the concept I'm referring to but I could be wrong. I'm thinking 'Relative' is also close but it doesn't feel like it is specific enough to this concept.