1. Produced by or producing fever
   - pyrogenic, pyrogenetic 
2. Produced under conditions involving intense heat
   - igneous, pyrogenic

See also: heat, pyrogen

• unbecomingness
• unbefitting
• unbeholden
• unbeknown
• unbeknownst
• unbelief
• unbelievable
• unbelievably
• unbeliever
• unbelieving
• unbelievingly
• unbeloved
• unbelt
• unbelted
• unbend
• unbendable
• unbending
• unbeneficed
• unbent
• unbiased
• unbiassed
• unbidden
• unbigoted
• unbind
• unbitter