Synonyms for Wondering:

adj.

astonished (adjective)
astonished, appalled, confounded, astounded, dumbfounded, staring, aghast, bewildered, gawking, Marveling, overwhelmed, fascinated, alarmed.
inquisitive (adjective)
guessing, speculative, questioning, Speculating, curious, pondering.
marveling (adjective)
admiring, awed, fascinated, Wonderstruck, awestruck.

n.

flabbergasted, Speculating, pondering, Wonderstruck, in awe, guessing, struck, awestruck, awed, admiring. wondering (noun)
inquisitive, questioning, speculative, curious.

v.

doubting (verb)
doubting, disbelieving, Suspecting, questioning, Distrusting, wavering, vacillating.
wondering (verb)
astounding, fascinating, engrossing, gaping, astonishing, bewildering.

Other synonyms:

Other relevant words:
curious, flabbergasted, awed, speculative, inquisitive, in awe, pondering, admiring, Speculating, awestruck, guessing.

Usage examples for wondering

  1. I was wondering if he was on his way to see me." – Hand and Ring by Anna Katharine Green
  2. Woman's lot is wondering and waiting at home. – Parrot & Co. by Harold MacGrath
  3. Dad, Ken said, I've been wondering when we could get started on the project again. – The Year When Stardust Fell by Raymond F. Jones