The term SUFFIX WITH HUMAN can be solved by two three-letter words: OID and IST. OID is a suffix derived from the Greek word 'oides' meaning 'LIKE' or 'RESEMBLING'. It is commonly used to describe a condition or disorder that is similar to another, such as 'PARANOID' which means having symptoms of paranoia. IST is a suffix derived from the Latin word 'ista' meaning 'one who does'. It is commonly used to describe someone who practices a certain profession or activity, such as 'dentist' which means one who practices dentistry.