beam scale vs lever scale

beam scale and lever scale both are nouns.

Word	Noun	Adjective	Verb	Adverb
beam scale	Yes	No	No	No
lever scale	Yes	No	No	No

As nouns, beam scale and lever scale are synonyms defined as:

beam scale and lever scale: a portable balance consisting of a pivoted bar with arms of unequal length

Other synonyms of beam scale include steelyard.

beam scale (noun)	lever scale (noun)
a portable balance consisting of a pivoted bar with arms of unequal length	a portable balance consisting of a pivoted bar with arms of unequal length