Synonyms and related words :
agonize over, be at sea, be uncertain, beat about, doubt, examine, explore, feel, feel around, feel for, feel unsure, fish, flounder, fumble, grabble, grope for, poke, poke around, probe, prod, pry, pry around, puzzle over, question, quick look, root, scrabble, search, tentative examination, thrash about, wonder, wonder whether