superfirm
adjective
su·per·firm ˌsü-pər-ˈfərm 
: extremely firm
superfirm mattresses
Word History
First Known Use
1928, in the meaning defined above
- forces letter
- forces on
- forces upon
- forchette
- forcibilities
- forcibility
- forcible
- forcible entry
- forcible-feeble
- forcibleness
- forciblenesses
- forcibler
- forciblest
- forciblier
- forcibliest
- forcibly
- forcing
- forcing bed
- forcing cone
- forcing ground
- forcing house
- forcing on
- forcing pump
- forcing system
- forcing upon