Open
Open adjective - Being in a situation where one is likely to meet with harm.
Usage example: the country's open to invasion if its borders remain unguarded
Subject is a synonym for open in susceptible topic. In some cases you can use "Subject" instead the word "Open" as an adjective or a verb, when it comes to topics like likely, liable, at risk of. popular alternative
Subject
Subject adjective - Possibly accepting or permitting.
Usage example: the time is fixed by the director and players and therefore subject to much variation
Open is a synonym for subject in likely topic. You can use "Open" instead the word "Subject" as an adjective or a verb, if it concerns topics such as liable, answerable. popular alternative
Mutual synonyms
Common collocations
| level | open level | subject level |
Both words in one sentence
- And then there's Matt, who didn't even have that much of a personality, so that subject is pretty open.
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An Elegy for the Still-living implies that this is the case without ever openly stating it, and the ending is left rather open ended on the subject.
Source: All Just a Dream -
Jenny Everywhere, the open-source subject of many webcomics, exists in all possible dimensions and can shift between them.
Source: Another Dimension
Cite this Source
Subject and Open. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/open/subject
Open & Subject. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/open/subject>.
Subject or Open. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/open/subject.
Google Ngram Viewer shows how "open" and "subject" have occurred on timeline