97 entries under observant topic. ×

1
insightful(adjective, understanding, cool, significant, intelligent)
1
knowledgeable(adjective, understanding, cool, significant, careful)
1
known(adjective, understanding, keen, sensible, certain)
1
not missing a trick(expression, adjective, idiom, alert, careful)
1
noticing(adjective, understanding, keen, sensible, certain)
1
noting(adjective, understanding, keen, sensible, certain)
1
on to(expression, adjective, understanding, keen, sensible)
1
penetrating(alert, intelligent, perceptive, attentive, watchful)
1
perceiving(adjective, understanding, keen, sensible, certain)
1
recognizing(adjective, understanding, keen, sensible, certain)
1
remarking(adjective, understanding, keen, sensible, certain)
1
responsive(adjective, understanding, keen, sensible, certain)
1
seeing(adjective, understanding, keen, sensible, certain)
1
sensitive(alert, intelligent, perceptive, attentive, watchful)
1
sensitive to(expression, adjective, understanding, keen, sensible)
1
sentient(adjective, understanding, cool, keen, sensible)
1
sophic(adjective, understanding, cool, significant, intelligent)
1
supraliminal(adjective, understanding, keen, sensible, certain)
1
sure(adjective, understanding, keen, sensible, certain)
1
tuned in(expression, adjective, understanding, careful, intelligent)
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APASmart Define. (2015). vigilant thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/vigilant/thesaurus/synonyms
ChicagoSmart Define. 2015. "vigilant thesaurus" https://smartdefine.org/vigilant/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, vigilant thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/vigilant/thesaurus/synonyms>.
MLASmart Define. "vigilant thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/vigilant/thesaurus/synonyms>