heterosexualism vs straightness

heterosexualism and straightness both are nouns.

Word	Noun	Adjective	Verb	Adverb
heterosexualism	Yes	No	No	No
straightness	Yes	No	No	No

As nouns, heterosexualism and straightness are synonyms defined as:

heterosexualism and straightness: a sexual attraction to (or sexual relations with) persons of the opposite sex

Other synonyms of heterosexualism include heterosexuality.

heterosexualism (noun)	straightness (noun)
a sexual attraction to (or sexual relations with) persons of the opposite sex	a sexual attraction to (or sexual relations with) persons of the opposite sex
	freedom from crooks or curves or bends or angles
	(of hair) lack of a tendency to curl
	having honest intentions
	trueness of course toward a goal