Synonyms and related words :
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, stewardship, surveillance, vigil, vigilance, wariness, watch, watch and ward, watchful eye, watchfulness, watching, weather eye