Hydra
Hydra noun - Trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality.
Infiltration and hydra are semantically related. In some cases you can use "Infiltration" instead a noun "Hydra".
Nearby Word: hydrate
Infiltration
Infiltration noun - A process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection).
Hydra and infiltration are semantically related. Sometimes you can use "Hydra" instead a noun "Infiltration".
Both words in one sentence
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Ripped from the Headlines: Hydra's infiltration of SHIELD is specifically said to have begun with Operation Paperclip.
Source: Comic Book / Hydra - The Infiltration: It's revealed that HYDRA had infiltrated SHIELD shortly after the latter had been formed.
Source: Comic Book / Hydra - Natasha is Hauled Before a Senate Subcommittee for leaking all of S.H.I.E.L.D.'s secrets in order to expose HYDRA's infiltration.
Cite this Source
Infiltration and Hydra. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hydra/infiltration
Hydra & Infiltration. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hydra/infiltration>.
Infiltration or Hydra. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hydra/infiltration.
Google Ngram Viewer shows how "hydra" and "infiltration" have occurred on timeline