Written Japanese contains a syllabary (like an alphabet) called Kana. All of the "letters" in this syllabary, with the exception of the "letter" "N" (/) end in a vowel. Thus anytime a foreign word ends in a consonant (with the exception of "N"), it is natural for a Japanese speaker to pronounce this consonant with a vowel after it. This is not a question of suffix usage but a question of pronunciation. Note that all the words you listed have a pronunciation that ends in a consonant (the e in rope and type are not audible).
See: <