Backtracked vs Backtracker - What's the difference?

As a verb backtracked

is (backtrack).

one who, or that which, backtracks.

(head)

(backtrack)

(en noun)

the act of

(en verb)

to retrace one's steps

I dropped my sunglasses and had to backtrack to find them.

to repeat or review work already done

If we backtrack through this problem, maybe we can figure out where we went wrong.

(aviation) To taxi down an active runway in the opposite direction to that being used for takeoff

Speedbird One: Enter and backtrack Runway 27 Left

(en noun)

One who, or that which, backtracks.