FLY - Any insect of the order Diptera; characterized by having two wings, also called true flies.
LOT - A large quantity or number; a great deal.
SLY - Artfully cunning; secretly mischievous; wily.
SOY - A Chinese and Japanese liquid sauce for fish, made by subjecting boiled beans to long fermentation and then long digestion in salt and water. US preference is the term soy sauce.
TOY - An inferior graffiti artist.
OFT - Often; frequently; not rarely; many times.
LOFT - Air, the air; the sky, the heavens.
LOST - Simple past tense and past participle of lose.
SLOT - A narrow depression, perforation, or aperture; especially, one for the reception of a piece fitting or sliding in it.
SOFT - Giving way under pressure.
LOFTY - High, tall, having great height or stature.
SOFTLY - In a soft manner; gently.