Solutions Mega- has 7 entries with similar clues

• 4-letter words
• theemegan ... stallion, us rapper
• teraKilo, mega, giga, ..
• 5-letter words
• smashmegahit
• moody"Judy ...... and the NOT Bummer Summer" (children's book by Megan Jo McDonald)
• 10-letter words
• stonehengeMegalithic monument on Salisbury Plain
• 11-letter words
• loudspeakerElectronic megaphone
• 12-letter words
• stone-circleMegalithic monument