Here are two context clues worksheets on the verb convene (used both intransitively and transitively) and the noun convention. I’ve used these and others like them (which are forthcoming here) to help students understand the relationships between words as they are distributed across the parts of speech.
If you find typos in these documents, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.