The term 'SPEAK FOR' can be represented by three different crossword solutions: ESPOUSE (7 letters), VOUCH (5 letters), and REPRESENT (9 letters). ESPOUSE means to publicly support or advocate for a particular cause, opinion, or belief. VOUCH is to give personal assurance or guarantee of something. Lastly, REPRESENT means to act on behalf of someone else or to stand in for them. All three words are related to the idea of speaking on behalf of someone or something.