There is not a plastic products company called "Happy."
Also, "Glad" has one syllable. "Happy" has two.
But seriously--my impression is that glad is a more visceral feeling--like giddy or dizzy--where happy seems to be more cerebral.
Glad is a reaction, Happy is a thought process.
In Danish, "happy" is "lykkelig" or "glad."
glad ladglad lad
What is the difference between smiling and frowning?
Merry is jubilantly happy!
Glad.
happy
A four letter word meaning happy is glad.
Happy , elated, ecstatic, are synonyms of glad.
glad father
They are (Happy/Glad/Lucky/Fortunate?etc) They are (Happy/Glad/Lucky/Fortunate?etc)
Glad
happy