bilaterally symmetrical vs zygomorphous

bilaterally symmetrical and zygomorphous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bilaterally symmetrical	No	Yes	No	No
zygomorphous	No	Yes	No	No

As adjectives, bilaterally symmetrical and zygomorphous are synonyms defined as:

bilaterally symmetrical and zygomorphous: capable of division into symmetrical halves by only one longitudinal plane passing through the axis

Other synonyms of bilaterally symmetrical include zygomorphic.

bilaterally symmetrical (adjective)	zygomorphous (adjective)
capable of division into symmetrical halves by only one longitudinal plane passing through the axis	capable of division into symmetrical halves by only one longitudinal plane passing through the axis
having identical parts on each side of an axis