wonder

[1]	ponder , muse , meditate , think , theorize , conjecture , puzzle , query , question , inquire , be inquisitive , be curious , ask oneself , speculate , cudgel (one's) brains
[2]	marvel (at) , inquire , enquire , goggle , gawk , gape , stare , be awed , be thunderstruck , be amazed , be astonished
[3]	wonder about , question , question/doubt the sanity/reason/reasonableness of
[4]	marvel

[1]	wonderment , marvel , prodigy , admiration , phenomenon , spectacle , rarity , sight , curiosity , miracle , (Slang) knockout , stunner , mind-blower , mind-boggler , trip
[2]	awe , marvel , astonishment , admiration , amazement , wonderment , surprise , stupefaction , fascination
[3]	curiosity