An after-dinner speech can be described as a number of synonyms to add variety to your speech vocabulary. Synonyms for the term after-dinner speech can include toast, a keynote address, or an evening speech. Other synonyms may include a presentation, speech, or lecture. Alternatively, you may choose to use the term dinner talk, banquet speech, or post-prandial address. These terms can add an air of sophistication to your speech and also demonstrate a wider range of language skills. Whichever synonym you choose, remember to keep things light and engaging, and aim to educate and entertain your audience.