braid vs pigtail

braid and pigtail both are nouns.

Word	Noun	Adjective	Verb	Adverb
braid	Yes	No	Yes	No
pigtail	Yes	No	No	No

As nouns, pigtail is a hyponym of braid; that is, pigtail is a word with a more specific, narrower meaning than braid:

Other hyponyms of braid include queue.

braid (noun)	pigtail (noun)
trimming used to decorate clothes or curtains	a plait of braided hair
a hairdo formed by braiding or twisting the hair

braid (verb)	pigtail (verb)
form or weave into a braid or braids
decorate with braids or ribbons
make by braiding or interlacing