Synonyms of 'relatively'
You use rather to indicate that something is true to a fairly great extent, especially when you are talking about something unpleasant or undesirable.
I'm afraid it's rather a long story.
You use somewhat to indicate that something is the case to a limited extent or degree.
He concluded that Oswald was somewhat abnormal.
Thesaurus for relatively from the Collins English Thesaurus
Relatively means to a certain degree , especially when compared with other things of the same kind .