lumberman's saw vs two-handed saw

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

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

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

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

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

lumberman's saw (noun)	two-handed 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