Hard
Hard adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.
Usage example: a woman with a hard will who never budged from her chosen path
Persistent is a synonym for hard in diligent topic. In some cases you can use "Persistent" instead an adjective "Hard".
Persistent
Persistent adjective - Continuing despite difficulties, opposition, or discouragement.
Usage example: although his first attempts were singularly unsuccessful, he was persistent in his pursuit of a career in rock music
Mutual synonyms
Both words in one sentence
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Orks are extremely durable and persistent; because they reproduce through spores that fly off from their skin, ork infestations are hard to eliminate once they have set foot on a planet.
Source: Our Orcs Are Different -
They are always improbably hard to stop, incredibly persistent, never needs to recharge and always, always terrifying to look at.
Source: Mechanical Monster - These stubborn and persistent people believe in the value of a hard days work, and can have the patience and fortitude to see it through.
Source: Analysis / Eastern Zodiac
Cite this Source
Persistent and Hard. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hard/persistent
Hard & Persistent. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hard/persistent>.
Persistent or Hard. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hard/persistent.
Google Ngram Viewer shows how "hard" and "persistent" have occurred on timeline