You have to put up with him (8)
I believe the answer is:
roommate
This might be a double definition.
'you have' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'up with him' is the second definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'to put' acts as a link.
Can you help me to learn more?
(Other definitions for roommate that I've seen before include "One shares your accommodation" , "Fellow lodger" , "Person with whom one shares" , "I have to live with him" , "Stable companion" .)