7 letter words: amputee, daphnes, enthuse, headset, methane, peahens, sauteed, stamped, stemmed, umpteen, untamed, updates, spammed, peanuts, dustman, anthems, dampens, demeans, dustmen, haunted, pedants, standup, stumped, unsated, thumped, steamed, shunted, meanest, handset, dustpan, dements, dampest
outside
chrisms
minimum
inkiest
gradate
outside
You can make two 7 letter words : COSTARS and CASTORS
Germany
lidless
Demented
netball
choanae
stammer
laminae
Wiriest
chrisms
No 7 letter words, the longest is 6 letters, purist