Krypton, Argon
Nickel is an element that rhymes with tickle.
Tin is an element that rhymes with chin.
The element that rhymes with "keen" is "tin."
Nothing rhymes with polygons. I don't know why but if you try you will not get real words.
phosphorous
antimony
Phosphorus
tin
The word "cobalt" rhymes with "proballt" and "snowballt."
The answer would be something scientific like "elephants"!!! JK>>
Gold.
agleamairstreambeambeseemblasphemebloodstreambreamcreamcremecrossbeamdaydreamdeemdownstreamdreamesteemextremegleaminseammainstreammidstreammillstreammoonbeammorphemephonemepipedreamracemereamredeemregimeschemescreamseamseemsteamstreamsunbeamsupremeteamteemthemeupstream