trachea vs windpipe

trachea and windpipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
trachea	Yes	No	No	No
windpipe	Yes	No	No	No

As nouns, trachea and windpipe are synonyms defined as:

trachea and windpipe: membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi

trachea (noun)	windpipe (noun)
membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi	membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi
one of the tubules forming the respiratory system of most insects and many arachnids