Synonyms for observational
ob·ser·va·tion·al

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1. experimental, data-based, observationaladjective

   relying on observation or experiment

   "experimental results that supported the hypothesis"

   Synonyms:
   data-based, experimental

   Antonyms:
   theoretic, theoretical

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1. List of paraphrases for "observational":

   observation, observer, observing, comment

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How to use observational in a sentence?

1. Anastasios Tzanidakis:

   Over 66 years of observational history, we found no other signs of significant dimming in this star.

2. Antranik Sefilian:

   The problem is when youre observing the disc from inside the system, its almost impossible to see the whole thing at once. While we dont have direct observational evidence for the disc, neither do we have it for Planet Nine, which is why were investigating other possibilities, nevertheless, it is interesting to note that observations of Kuiper belt analogues around other stars, as well as planet formation models, reveal massive remnant populations of debris.

3. John Rumsfeld:

   The current study is a preliminary,' first step' evaluation of a potential relationship between exhaustion and atrial fibrillation, it is purely an observational study -- it can not conclude a causal relationship, or even which direction such a relationship would go.

4. John Mather:

   What comes next ? All the tools are working, better than we hoped and promised. Scientific observations, proposed years ago, are being made as we speak, we want to know : Where did we come from ? What happened after the big bang to make galaxies and stars and black holes ? We have predictions and guesses, but astronomy is an observational science, full of surprises.

5. Riyaz Patel:

   Despite many years of research this question about eggs and health has not been answered, with multiple observational studies over the last few decades showing conflicting results -- some suggesting moderate egg intake is good, while others suggesting it may be bad, this study, although well conducted, unfortunately only adds more noise to the discussion.