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.
pone, moan, loan, cone, bone, tone, sewn, thrown, known,
bed, lead, fed
phone
Wwe 123
wonder head
boar head
head lice
Sloan Stone (as in Stone Phillips - news anchor)
phone,clone,and mone
suits and phone
phone card
head check? (you know, like a head count)
Thread.
fat head