Words pronounced the same but with no letters in common?
You & Ewe
Most names that are not Hispanic in origin are spelled the same in Spanish and in English, but may be pronounced differently. Ulman is spelled the same but would probably be pronounced "OOL-mahn" by a person who speaks Spanish. Sites such as learn-spanish.co.il provide audio pronunciations of many common Spanish words.
If you are asking if they use the same alphabet as us, then slightly yes. Almost all letters are the same, except for ''ñ,'' ''ch,'' ''ll,'' ''ü'' and sometimes ''rr.'' There are also the accented letters, such as ''á,'' ''í,'' ''ú,'' ''é,'' and ''ó.'' Of course, the two alphabets are pronounced differently, and in Spanish capital letters are used to a lesser extent than in English (= 'ingles', for example).
6 No...This word has three syllables, for this or any word it is a method of spelling in which words would be spelt as they are pronounced, or pronounced as they are spelt, each letter or combination of letters always being used to represent the same sound. So, enthusiasm would translate into en-thyoozi-azm