The term 'spout nonsense' can be defined by the following crossword solutions: SCAT (4 letters), HARANGUE (8 letters), RANT (4 letters), RAVE (4 letters), PRATTLE (7 letters), and TALKTHROUGHONES (15 letters). SCAT is a term used to describe talking or singing in a nonsensical way, while HARANGUE is a long, angry speech. RANT is similar to HARANGUE, but it is usually less organized and more emotional. RAVE is an enthusiastic expression of approval or admiration. PRATTLE is talking or writing that is silly or meaningless. Finally, TALKTHROUGHONES is a phrase used to describe someone who talks without making sense. All of these terms can be used to describe someone who is spouting nonsense.