lumberman's saw vs two-man saw

lumberman's saw and two-man saw both are nouns.

Word	Noun	Adjective	Verb	Adverb
lumberman's saw	Yes	No	No	No
two-man saw	Yes	No	No	No

As nouns, lumberman's saw and two-man saw are synonyms defined as:

lumberman's saw and two-man saw: a saw with handles at both ends; intended for use by two people

Other synonyms of lumberman's saw include two-handed saw, whipsaw.

lumberman's saw (noun)	two-man saw (noun)
a saw with handles at both ends; intended for use by two people	a saw with handles at both ends; intended for use by two people