Please help us help you and fill where relevant:
Your LimeSurvey version: LimeSurvey Cloud Version 5.3.6
Own server or LimeSurvey hosting: LimeSurvey hosting
Survey theme/template: Fruity
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Hello,

I was wondering if it is possible to have the URL for one survey be different than the survey site URL?
For example, currently the link is: https://abcd.limesurvey.net as the site name is abcd. I would like to have my specific survey to be: https://efgh.limesurvey.net WITHOUT changing the site name. Is there a way to do this? 

I saw some discussion on the forum about using a subdomain or using something called .htaccess? But I am not sure how to go about this and if it could work for this inquiry.

Thank you! 

Not really …

1. Create your domain to allow abcd or efgh (multiple servername)
2. Create some plugin to redirect to the needed url according to survey id
3. Create some plugin to use publicurl different for each surey

But : you must start by 1, see nginx.org/en/docs/http/server_names.html for nginx.