Jdarg in response to your question I looked up these words:
1.
discuss- to
talk or write about (a topic) in detail, taking into account
different ideas and opinions
2.
argue- give reasons or cite evidence in support of an idea, action, or
theory, typically with the
aim of persuading others to share one's
view in a heated or angry way
3.
debate- a formal
discussion on a particular topic in a public meeting or
legislative assembly, in which opposing arguments are put
forward,with the intent being,
to consider a possible course of
action in one's mind before reaching a decision
4.
motive-
reason for doing something, especially one that is hidden or not
obvious