Deny and Admit
To deny means to say that something is not true.
"I did not leak information to our competitors".
He denied that he had leaked information to their competitors.
To admit means to say that something is true.
"I leaked information to our competitors".
He admitted that he had leaked information to their competitors.
To explain may mean to give the cause or reason for something.
To explain may also mean to clarify a topic or an idea further.
"He has trouble breathing because he has asthma".
The doctor explained that he had trouble breathing because he had asthma.
Agree and Insist
To agree means to go with somebody else’s idea.
To insist means to push one’s own idea on somebody else.
Promise and Threaten
To promise means to verbally commit to a certain course of action.
To threaten means to tell someone that you will do something undesirable to that person.
Remind and Warn
To remind means to help someone remember something important.
To warn means to let someone know that something bad will happen if a certain action is done or a certain event happens.
Assure means telling something positive to someone to remove any doubt, anxiety or hesitation.
Add means saying something more, a further remark.
Recommend means giving an advice or suggestion, usually a possible course of action.
Report means giving an explanation or a statement about something that has been seen, observed, or heard about by someone.
Suggest means expressing an idea to someone for his/her consideration.