I vaguely remember the suffix "-titude" is related to a state of a particular action, such as "certitude", which means a state of being sure. But I don't know what this kind of suffix actually is relevant to and how it differs from another suffix "-titute".
-tude : is a common suffix used to form abstract nouns:
- syllable formed when the word-forming element -ude, making abstract nouns from adjectives and participles, is fixed to a base or to another suffix ending in -t or -te; from French -ude, from Latin -udo (stem -udin-). The equivalent of native -ness. (words ending with -tude)
- -tute or -ute are not really suffixes with a specific connotation! (words ending with -tute)