A beautiful name that clearly speaks of the winter season.
The word "wintr" contains only five characters and only one syllable. Mono-syllable names are exceptionally rare and very sought after. Successful brands using one syllable names include Dell, Square and Nike.
Wintr.com is a dot-com domain. Dot com domains are the most desirable domain extension in the world, used by famous websites like google.com. Once secured, a dot-com all but guarantees no-one else can outrank you for your own name in the long run.