Open English Wordnet
Verbs
(v)chew over, think over, meditate, ponder, excogitate, contemplate, muse, reflect, mull, mull over, ruminate, speculatereflect deeply on a subject“I mulled over the events of the afternoon”, “philosophers have speculated on the question of God for thousands of years”, “The scientist must stop to observe and start to excogitate”
(v)reflect, reverberateto throw or bend back (from a surface)“Sound is reflected well in this auditorium”