Need help with Vocab

[Maverick]

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Incorporating synonyms while studying Vocab

I was watching a Sentence Equivalence class by Greg and there he emphasized incorporating ‘GRE synonyms’ (around 2 or 3) for words you study. For someone having weak vocab and recently started with Vocab prep, how do I know whether the synonym is ‘GRE level’ ? Should I just go to Google → Search the list for synonyms and find the ones that seem fancy? Or should I first complete the word list and then think of this? TIA \m/