Ranked by relevance and common usage.
Keep "phenomenalness" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "phenomenalness" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "phenomenalness", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "phenomenalness" or choose a simpler alternative from the closest-match group.
3 total sentences available.
[I]n that apprehension of self which Mr Ferrier justly lays down as at the root of knowledge, the self apprehended is not merely the same thing as the self apprehending, in which case the process would be unimportant: the apprehending the apprehended self is the clothing it with various predicates (then, indeed, first understood), among them locality (corporealness or phenomenalness).
Source: wiktionary
A Semitic verb, in which accordingly is but the phantom of an implied nominative held suspended!—the Divine assertion of an “i am that i am,” in which, however, is so the pronoun suppressed, as that rightly is the actual mere phenomenalness of the Universe, as revealed to us, and not any real absoluteness of it, at all sought to be represented:—only that which is mere Motion and E-motion, rightly figurable by the mere verb, being presumed to be included in the “name.”
Source: wiktionary
I therefore will not make my views known, in an intellectual sense—other than to say that I’m ready to make known the view that I don’t think of making views known as being intellectual work or an intellectual gesture. Because, as we see, such making known of views can only pose a temptation and a really unpleasant dilemma for the one on whose behalf that intellectual type has made his views known! But it’s something else entirely if this same type, in a moment of some incomprehensible courage, were to come out against one or another individual and one or another phenomenon whose phenomenalness comes directly from that individual.
Source: wiktionary
Closest matches include fascination, mystery, prodigiousness, wonderfulness.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.