94 entries under idiom topic. ×

1
keep an eye out(verb, expression, mind, notice)
1
keep in sight
1
keep in view
1
keep under observation
1
look out for(verb, expression, phrasal verb, seek)
1
make a reconnaissance
1
pay attention to(verb, expression, mark, consider)
1
play the spy
1
put to the test(expression, study, consider, examine)
1
put under surveillance
1
set eyes on(verb, expression, phrasal verb, consider)
1
spy satellite(expression, warning)
1
take a gander(verb, expression, consider, see)
1
take a look(expression, look, watch, eye)
1
take notice of(verb, expression, mark, see)
1
tune in on(expression, bug, poke, tap)
1
watch secretly
0
advanced guard(expression, warning)
0
adventure film(expression, the drama)
0
agent of espionage
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APASmart Define. (2016). spy thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/spy/thesaurus/synonyms
ChicagoSmart Define. 2016. "spy thesaurus" https://smartdefine.org/spy/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, spy thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/spy/thesaurus/synonyms>.
MLASmart Define. "spy thesaurus" 10 February 2016. Web. 27 September 2026. <https://smartdefine.org/spy/thesaurus/synonyms>