1) Chew over 2) Contemplate 3) Excogitate 4) Meditate 5) Mull 6) Mull over 7) Muse 8) Ponder 9) Reflect 10) Ruminate 11) Speculate 12) Think over 13) To consider 14) To determine, resolve 15) To meditate, ponder 16) To think about, to recollect 17) To think of or that Found on https://www.crosswordclues.com/clue/bethink
• (v. i.) To think; to recollect; to consider. • (v. t.) To call to mind; to recall or bring to recollection, reflection, or consideration; to think; to consider; -- generally followed by a reflexive pronoun, often with of or that before the subject of thought. Found on http://thinkexist.com/dictionary/meaning/bethink/