What is another word for aptness of their title?
Pronunciation: [ˈaptnəs ɒv ðe͡ə tˈa͡ɪtə͡l] (IPA) 
The phrase "aptness of their title" can be interpreted in a few different ways, but generally refers to how well a particular name or label fits the thing it is referring to. Synonyms for "aptness" include relevance, suitability, appropriateness, fittingness, and applicability. For "title," you could use label, name, designation, or heading. So, some possible synonyms for "the aptness of their title" might be the relevance of their label, the suitability of their name, the fittingness of their designation, or the appropriateness of their heading. Depending on the context, there may be other terms that better capture the intended meaning.
