Assure
Part of speech: verb
Definition: To make sure and secure. To give (someone) confidence in the trustworthiness of (something). To guarantee, promise (to do something). To reassure.
Example sentence: It is up to African leaders to show their will and political courage in order to assure that this new pan-African institution becomes an efficient instrument and not a place for endless discussions.
Promise
Part of speech: noun
Definition: An oath or affirmation; a vow.A transaction between two persons whereby the first person undertakes in the future to render some service or gift to the second person or devotes something valuable now and here to his use
Part of speech: verb
Definition: to commit to something or action; an oath; a vow.
Example sentence: I don't know where I'm going from here, but I promise it won't be boring.