Initial
The opposite for the word plain starting with letter f is FANCY.
amateur
Given
stop
irrelavent
Modern.
stopping
stopping
Wisdom is the opposite of folly. It begins with the letter w.
Mighty is the opposite of weak. It begins with the letter m.
Narrow is the opposite of wide. It begins with the letter N.
Gloomy and glum are the opposite of cheerful. They begin with the letter G.