chevron vs grade insignia

chevron and grade insignia both are nouns.

Word	Noun	Adjective	Verb	Adverb
chevron	Yes	No	No	No
grade insignia	Yes	No	No	No

As nouns, chevron and grade insignia are synonyms defined as:

chevron and grade insignia: V-shaped sleeve badge indicating military rank and service

Other synonyms of chevron include stripe, stripes.

chevron (noun)	grade insignia (noun)
an inverted V-shaped charge	V-shaped sleeve badge indicating military rank and service
V-shaped sleeve badge indicating military rank and service