The word conflict can function as both a noun and a verb, depending on its use in a sentence.
As a noun, conflict refers to a disagreement, struggle, or clash between opposing forces. For instance, you might say, ‘There is a conflict between the two groups over resource allocation.’
As a verb, conflict means to be in opposition or to disagree. An example of this usage would be, ‘Their schedules conflict, making it hard to meet.’
Understanding the context in which conflict is used will help you determine its part of speech in any given situation.