- Definitions|0
- Thesaurus|73
- Abbreviations|0
11 entries under expression topic. ×
| keep under surveillance(verb, idiom, examine, discover) | |
| keep a close watch on(verb, idiom, observe, watch) | |
| keep an eye on(verb, idiom, observe, examine) | |
| keep tabs on(verb, idiom, observe, watch) | |
| keep track of(verb, idiom, observe, watch) | |
| keep under observation(verb, idiom, watch, stalk) | |
| listen in(verb, tap) | |
| listen in on(verb, idiom, tap) | |
| watch carefully(verb, observe, watch, monitor) | |
| watch closely(verb, observe, watch, monitor) | |
| watch from hiding |
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| APA | Smart Define. (2015). spy on thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/spy_on/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "spy on thesaurus" https://smartdefine.org/spy_on/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, spy on thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/spy_on/thesaurus/synonyms>. |
| MLA | Smart Define. "spy on thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/spy_on/thesaurus/synonyms> |