There is no one word that rhymes with headphones but you can combine words to rhyme with it like: dead zones and red stones. Or even a name like Ted Jones.
phone
Wwe 123
Sloan Stone (as in Stone Phillips - news anchor)
wonder head
boar head
head lice
suits and phone
phone card
phone,clone,and mone
head check? (you know, like a head count)
Thread.
fat head