screwing vs piece of tail

screwing and piece of tail both are nouns.

Word	Noun	Adjective	Verb	Adverb
screwing	Yes	No	No	No
piece of tail	Yes	No	No	No

As nouns, screwing and piece of tail are synonyms defined as:

Other synonyms of screwing include ass, fuck, fucking, nookie, nooky, piece of ass, roll in the hay, screw, shag, shtup.

screwing (noun)	piece of tail (noun)
slang for sexual intercourse	slang for sexual intercourse