sweltering vs sweltry

sweltering and sweltry both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sweltering	No	Yes	No	No
sweltry	No	Yes	No	No

As adjectives, sweltering and sweltry are synonyms defined as:

sweltering and sweltry: excessively hot and humid or marked by sweating and faintness

sweltering (adjective)	sweltry (adjective)
excessively hot and humid or marked by sweating and faintness	excessively hot and humid or marked by sweating and faintness