[1] : WordNet (r) 2.0

sniff out
     v : recognize or detect by or as if by smelling; "h can smell
         out trouble" syn: scent out, smell out, nose out
see also:
scent out smell out nose out 

[2] : Moby Thesaurus II by Grady Ward, 1.0

23 moby thesaurus words for "sniff out":
   be warm, burn, follow, follow a clue, follow up, get wind of,
   hunt down, nose, nose out, run down, run to earth, scent, shadow,
   smell, smell out, sniff, stalk, tail, trace, trace down, track,
   track down, trail

Bale Out >> B Words
Bale Out, definition of term: Bale Out
bale+out_pag1.html

Bawl Out >> B Words
Bawl Out, definition of term: Bawl Out
bawl+out_pag1.html

Bear Out >> B Words
Bear Out, definition of term: Bear Out
bear+out_pag1.html

Bail Out >> B Words
Bail Out, definition of term: Bail Out
bail+out_pag1.html

Back Out >> B Words
Back Out, definition of term: Back Out
back+out_pag1.html

Air Out >> A Words
Air Out, definition of term: Air Out
air+out_pag1.html

Ask Out >> A Words
Ask Out, definition of term: Ask Out
ask+out_pag1.html

Act Out >> A Words
Act Out, definition of term: Act Out
act+out_pag1.html