1) Brief 2) Ephemeral 3) Evanescent 4) Exclusively Saxon word 5) Exclusively Anglo word 6) Fugitive 7) Momentaneous 8) Momentary 9) Passing 10) Passing swiftly 11) Short 12) Short-lived 13) Temporary 14) Transient 15) Vanishing quickly 16) What time is 17) Word of purely Anglo origin 18) Word with Anglo-Saxon origins 1) Brief 2) Ephemeral 3) Evanescent 4) Fugacious 5) Fugitive 6) Lubricous 7) Momentaneous 8) Momentary 9) Provisional 10) Short 11) Superficial 12) Temporal 13) Transient 14) Transitory 
• (a.) Passing swiftly away; not durable; transient; transitory; as, the fleeting hours or moments. • (p. pr. & vb. n.) of Fleet
The area at which barges, towboats and tugs are berthed until needed. The operation of building or dismantling barge tows.
Fleet'ing adjective Passing swiftly away; not durable; transient; transitory; as, the fleeting hours or moments. Syn. -- Evanescent; ephemeral. See Transient .
[adj] - moving or passing by very swiftly 2. [adj] - lasting for a markedly brief time
fugitive adjective lasting for a markedly brief time; `a fleeting glance`; `fugitive hours`; `rapid momentaneous association of things that meet and pass`; `a momentary glimpse`
passing swiftly; vanishing quickly; transient; transitory: fleeting beauty; a fleeting glance.
lasting for a markedly brief time[Literary terms] lasting for a markedly brief time lasting for a markedly brief time[ACT vocabulary] lasting for a markedly brief time