backlash vs hap

backlash and hap both are nouns.

Word	Noun	Adjective	Verb	Adverb
backlash	Yes	No	Yes	No
hap	Yes	No	Yes	No

As verbs, hap is a hypernym of backlash; that is, hap is a word with a broader meaning than backlash:

Other hypernyms of backlash include come about, fall out, go on, happen, occur, pass, pass off, take place.

backlash (noun)	hap (noun)
an adverse reaction to some political or social occurrence	an accidental happening
a movement back from an impact

backlash (verb)	hap (verb)
come back to the originator of an action with an undesired effect	come to pass