Slow 2015 iMac Running OS Monterey 12.7.1

I am beyond frustrated. My iMac takes about 9-10 minutes to boot up. Launching Word or Outlook or Mail or Safari can take as long as 5 minutes. I have 32g of ram. Potential issues I see in the monitor are:

• "addressbooksourcebooksync" uses 24g of memory and 98% of CPU. not sure what this really means.
• "suggestd" also appears to use significant CPU capacity.

Before I attempt a fresh OS install, or replace the computer, I thought I would humbly ask the community to share their thoughts on this issue.

Many thanks,

KC