Based on the clue 'add this letter to jupiters moon io you get an ac...', what is the answer?

Based on the clue 'add this letter to boer to get the name of a rebel...', what is the answer? Based on the clue 'add this letter to cafe you get a word meaning to...', what is the answer? Based on the clue 'add this letter to crate it becomes a big bowl sh...', what is the answer? Based on the clue 'add this letter to earth you get a scarcity', what is the answer? Based on the clue 'add this letter to lack to get what a taut rope la...', what is the answer? Based on the clue 'add this letter to make ink red or at least a shad...', what is the answer? Based on the clue 'add this letter to mars you get a fen', what is the answer? Based on the clue 'add this letter to moral it becomes fatal', what is the answer?