wooden leg vs pegleg

wooden leg and pegleg both are nouns.

Word	Noun	Adjective	Verb	Adverb
wooden leg	Yes	No	No	No
pegleg	Yes	No	No	No

As nouns, wooden leg and pegleg are synonyms defined as:

Other synonyms of wooden leg include leg, peg.

wooden leg (noun)	pegleg (noun)
a prosthesis that replaces a missing leg	a prosthesis that replaces a missing leg