beam scale vs steelyard

beam scale and steelyard both are nouns.

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

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

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

Other synonyms of beam scale include lever scale.

beam scale (noun)	steelyard (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