Clear
Clear adjective - Allowing passage without obstruction.
Usage example: flooding was widespread, and only some roads are clear so far
Empty is a synonym for clear in open topic. In some cases you can use "Empty" instead the word "Clear" as a verb or an adjective, when it comes to topics like unobstructed, full, clean, free.
Empty
Empty adjective - Lacking contents that could or should be present.
Usage example: the refrigerator is empty, so we'll have to eat out
Clear is a synonym for empty in vacant topic. You can use "Clear" instead the word "Empty" as a verb or an adjective, if it concerns topics such as property, full, free, open.
Both words in one sentence
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On the other hand, detecting commercial shipping in open space is orders of magnitude easier, just because it is so empty and clear.
Source: Space Pirates -
He somehow gets free, leaving the empty, foot-shaped gaps drenched in his blood, but precisely how much of his feet he'd also left behind isn't clear.
Source: Life-or-Limb Decision -
The inverse of this is when a building or hallway full of people clear the area with remarkable speed, panic and thoroughness, so that the hero and the villain can duke it out in an empty hallway, possibly with loose papers flying around.
Source: Spontaneous Crowd Formation
Cite this Source
Empty and Clear. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/clear/empty
Clear & Empty. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/clear/empty>.
Empty or Clear. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/clear/empty.
Google Ngram Viewer shows how "clear" and "empty" have occurred on timeline