bonus vs dividend

bonus and dividend both are nouns.

Word	Noun	Adjective	Verb	Adverb
bonus	Yes	No	No	No
dividend	Yes	No	No	No

As nouns, dividend is a hyponym of bonus; that is, dividend is a word with a more specific, narrower meaning than bonus:

bonus: an additional payment (or other remuneration) to employees as a means of increasing output
dividend: a bonus; something extra (especially a share of a surplus)

Other hyponyms of bonus include premium, sales incentive, fourteenth salary.

bonus (noun)	dividend (noun)
anything that tends to arouse	that part of the earnings of a corporation that is distributed to its shareholders; usually paid quarterly
an additional payment (or other remuneration) to employees as a means of increasing output	a bonus; something extra (especially a share of a surplus)
	a number to be divided by another number