syn·fu·el 
(sĭnfy′əl)
(sĭnfy′əl)n.
A liquid or gaseous fuel derived by chemical processes from feedstocks such as coal, shale, tar sand, or biomass.
[SYN(THETIC) + FUEL.]
- identifiable
- identifiably
- identification
- identification card
- identifier
- identify
- identity
- identity crisis
- identity element
- identity function
- identity matrix
- identity politics
- identity sign
- identity theft
- ideo-
- ideogram
- ideogrammatic
- ideogrammatically
- ideograph
- ideographic
- ideographically
- ideography
- ideologic
- ideological
- ideologist