flirtation vs dalliance

flirtation and dalliance both are nouns.

Word	Noun	Adjective	Verb	Adverb
flirtation	Yes	No	No	No
dalliance	Yes	No	No	No

As nouns, flirtation and dalliance are synonyms defined as:

flirtation and dalliance: playful behavior intended to arouse sexual interest

Other synonyms of flirtation include coquetry, flirt, flirting, toying.

flirtation (noun)	dalliance (noun)
playful behavior intended to arouse sexual interest	the deliberate act of delaying and playing instead of working
	playful behavior intended to arouse sexual interest