8
carefully(adverb, reasonably, cautiously, vigilantly, sensibly)
7
cautiously(adverb, carefully, cautiously, vigilantly, sensibly)
7
watchfully(adverb, cautiously, vigilantly, attentively, guardedly)
6
attentively(adverb, carefully, cautiously, vigilantly, attentively)
6
vigilantly(adverb, vigilantly, attentively, guardedly, warily)
5
observantly(adverb, carefully, cautiously, attentively, intently)
4
heedfully(adverb, cautiously, vigilantly, attentively)
4
mindfully(adverb, cautiously, vigilantly, attentively)
4
warily(adverb, cautiously)
2
actively
2
adroitly
2
briskly
2
circumspectly(adverb, cautiously)
2
diligently(adverb, vigilantly, attentively)
2
keenly
2
prudently(adverb, cautiously, vigilantly)
2
quickly
2
sharp
2
sharply
1
advertently
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APASmart Define. (2015). alertly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/alertly/thesaurus/synonyms
ChicagoSmart Define. 2015. "alertly thesaurus" https://smartdefine.org/alertly/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, alertly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/alertly/thesaurus/synonyms>.
MLASmart Define. "alertly thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/alertly/thesaurus/synonyms>