sun helmet vs topee

sun helmet and topee both are nouns.

Word	Noun	Adjective	Verb	Adverb
sun helmet	Yes	No	No	No
topee	Yes	No	No	No

As nouns, sun helmet and topee are synonyms defined as:

sun helmet and topee: a lightweight hat worn in tropical countries for protection from the sun

Other synonyms of sun helmet include pith hat, pith helmet, topi.

sun helmet (noun)	topee (noun)
a lightweight hat worn in tropical countries for protection from the sun	a lightweight hat worn in tropical countries for protection from the sun