What is the difference between two these terms? Are they interchangeably used? Because when I sometimes look at the dictionary, I see this term, figurative, attached to some words which can be used in a figurative way.
Yes, they are. The two words may have different connotations, since metaphor sometimes can refer to phrases like a sea of troubles specifically (as opposed to organized chaos, an example of oxymoron, or cheeks like roses, an example of simile), but figurative and metaphorical are generally interchangeable.