Delete Plural if Singular Word also Listed

Looking for an elegant solution: delete plural word IFF singular is present. Sample table:

DECLARE @WordList TABLE (ID INT IDENTITY(1,1) PRIMARY KEY, Word nvarchar(100));
INSERT @WordList (Word) VALUES
('mosquitoes')
,('solo') 
,('zero')
,('embryos') 
,('zeros') 
,('avocado') 
,('embryo') 
,('avocados') 
,('buffaloes') 
,('domino')
,('buffalo') 
,('domino')
,('less')
,('solos')
,('echo') 
,('embargo') 
,('heroes')
SELECT COUNT(*) FROM @WordList;  -- 17

Kalman Toth Database & OLAP Architect SQL Server 2014 Design & Programming
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