[1] : WordNet (r) 2.0

weather eye
     n : vigilant attentiveness; "he keeps a weather eye open for
         trouble" syn: watchfulness, vigilance
see also:
watchfulness vigilance 

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

34 moby thesaurus words for "weather eye":
   x-ray eye, custodianship, custody, eagle eye, gimlet eye, guard,
   guardedness, guardianship, invigilation, keen eye, lookout,
   monitoring, observance, peeled eye, penetrating eye, proctoring,
   prudence, qui vive, sea legs, seamanlikeness, seamanliness,
   seamanship, sharp eye, shipmanship, stewardship, surveillance,
   vigil, vigilance, wariness, watch, watch and ward, watchful eye,
   watchfulness, watching

Compound Eye >> C Words
Compound Eye, definition of term: Compound Eye
compound+eye_pag1.html

Bulls Eye >> B Words
Bulls Eye, definition of term: Bulls Eye
bulls+eye_pag1.html