plod vs footslog

plod is a noun but footslog is not a noun.

Word	Noun	Adjective	Verb	Adverb
plod	Yes	No	Yes	No
footslog	No	No	Yes	No

As verbs, plod and footslog are synonyms defined as:

plod and footslog: walk heavily and firmly, as when weary, or through mud

Other synonyms of plod include pad, slog, tramp, trudge.

plod (noun)	footslog (noun)
the act of walking with a slow heavy gait

plod (verb)	footslog (verb)
walk heavily and firmly, as when weary, or through mud	walk heavily and firmly, as when weary, or through mud