athletic supporter vs suspensor

athletic supporter and suspensor both are nouns.

Word	Noun	Adjective	Verb	Adverb
athletic supporter	Yes	No	No	No
suspensor	Yes	No	No	No

As nouns, athletic supporter and suspensor are synonyms defined as:

athletic supporter and suspensor: a support for the genitals worn by men engaging in strenuous exercise

Other synonyms of athletic supporter include jock, jockstrap, supporter.

athletic supporter (noun)	suspensor (noun)
a support for the genitals worn by men engaging in strenuous exercise	a support for the genitals worn by men engaging in strenuous exercise