Latency between typing a work and seeing it on screen. Office for Mac 2011 (all upgrades installed) 14.3.6

I would  greatly appreciate finding a permanent solution to the on-going issue of the time (latency - spinning color wheel) between the key stroke and seeing the word on screen. This constant problem is making  'Outlook' unusable.  I have no other issues with any other Office program - only Outlook. I was advised to change the user profile to a new one, this was effective for several months but has slowly slipped back to now seeing the spinning wheel between whole sentences between typing and seeing the words on screen. I have changed my habits and switched to Thunderbird, not happy about being forced to move my email program because of this problem. Please assist. Thank you.