The most commonly reported flu symptoms are fever, chills, sweating, asthenia, headache and nausea.
Source: tatoeba (2654516)
Ranked by relevance and common usage.
Keep "asthenia" 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 "asthenia" 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 "asthenia", 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 "asthenia" or choose a simpler alternative from the closest-match group.
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3 total sentences available.
The most commonly reported flu symptoms are fever, chills, sweating, asthenia, headache and nausea.
Source: tatoeba (2654516)
The savage gets a headache when his thought is forced to flow in a stream of representation. In the imbecile, in the idiot we find the same thing manifested. They can only think in concrete sensory terms. In mental asthenia which approaches the state of the higher stages of imbecility and also in secondary dementia, states consequent on psychic degeneration, we find the same truth illustrated. The patient's mental activity falls many stages nearer to the level of presentative life. It is only in the higher forms of psychic life that representative elements become free, independent, and are freely and easily associated and dissociated.
Source: wiktionary
You see nothing that might even remotely suggest life, beyond the solitary brave watering the ponies below you; but that is because the asthenia of civilization has left you half blind as well as half deaf, for where you see nothing and hear nothing Geronimo is conscious of life, movement and sound-of rodents, reptiles and birds awaiting, quiescent, the lessening heat of dusk.
Source: wiktionary
Closest matches include astheny, debility, exhaustion, fatigue, feeling tired.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.