different between tightening vs screwing

English

Verb

tightening

1. present participle of tighten

Noun

tightening (plural tightenings)

1. The act or process of making more tight.

English

Pronunciation

Verb

screwing

1. present participle of screw

Noun

screwing (plural screwings)

1. The act by which something is screwed (in various senses).
   • 1843, Railway Times (volume 6, page 1260)

     I fear there is too much reason to acknowledge the truth of his remarks regarding the original formation of railways, but are the screwings out of the poor pittance received by some of the 20,000 at present employed to keep them in operation, to be the means of compensating the proprietors for the folly and extravagance then displayed?

   • 1854, George Dodd, The Curiosities of Industry and the Applied Sciences (page 35)

     But this was a sadly lingering process, since there must be as many screwings and unscrewings as there are copies to be printed.

2. (slang, vulgar) An act of sexual intercourse.

Translations

Adjective

screwing (comparative more screwing, superlative most screwing)

1. (archaic) Exacting; extortionate; close.