Trudge
Part of speech: noun
Definition: A tramp, i.e. a long and tiring walk.
Part of speech: verb
Definition: To walk wearily with heavy, slow steps. To trudge along or over a route etc.
Plod
Part of speech: verb
Definition: To walk or move slowly and heavily or laboriously (+ on, through, over).To trudge over or through.
Part of speech: noun
Definition: A slow or labored walk or other motion or activity.