94 entries under idiom topic. ×

12
undercover agent(noun, expression, person, plant)
11
secret agent(noun, expression, person, plant)
7
catch sight of(verb, expression, phrasal verb, consider)
6
double agent(noun, expression, person, plant)
5
get a load of(verb, expression, phrasal verb, mark)
5
stool pigeon(noun, expression, grass, sneak)
4
intelligence agent(noun, expression)
2
have in sight
2
keep under surveillance(verb, expression, follow, discover)
2
lay eyes on(verb, expression, consider, see)
2
pick up on(verb, expression, mark, see)
1
catch a glimpse of(verb, expression, consider, see)
1
clap eyes on
1
get an eyeful(verb, expression, see, catch)
1
get an eyeful of(verb, expression, mark, see)
1
give the once over(expression, study, consider, see)
1
have a care(verb, expression, mind, notice)
1
have a look-see(verb, expression, see, regard)
1
have a looksee
1
hold in view
10 years ago|13k views|share |citing 
APASmart Define. (2016). spy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/spy/thesaurus/synonyms
ChicagoSmart Define. 2016. "spy thesaurus" https://smartdefine.org/spy/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, spy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/spy/thesaurus/synonyms>.
MLASmart Define. "spy thesaurus" 10 February 2016. Web. 25 September 2026. <https://smartdefine.org/spy/thesaurus/synonyms>