isosceles triangle vs trigon

isosceles triangle and trigon both are nouns.

Word	Noun	Adjective	Verb	Adverb
isosceles triangle	Yes	No	No	No
trigon	Yes	No	No	No

As nouns, trigon is a hypernym of isosceles triangle; that is, trigon is a word with a broader meaning than isosceles triangle:

Other hypernyms of isosceles triangle include triangle, trilateral.

isosceles triangle (noun)	trigon (noun)
a triangle with two equal sides	a triangular lyre of ancient Greece and Rome
	(astrology) one of four groups of the zodiac where each group consists of three signs separated from each other by 120 degrees
	a three-sided polygon