lark vs sexcapade

lark and sexcapade both are nouns.

Word	Noun	Adjective	Verb	Adverb
lark	Yes	No	Yes	No
sexcapade	Yes	No	No	No

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

lark (noun)	sexcapade (noun)
any carefree episode	a sexual escapade; an illicit affair
any of numerous predominantly Old World birds noted for their singing
a songbird that lives mainly on the ground in open country; has streaky brown plumage
North American songbirds having a yellow breast

lark (verb)	sexcapade (verb)
play boisterously