1) Bang 2) Be intimate 3) Bonk 4) Do it 5) Fuck 6) Get it on 7) Get laid 8) Have a go at it 9) Have intercourse 10) Have it away 11) Have it off 12) Have sex 13) Hump 14) Jazz 15) Know 16) Lie with 17) Love 18) Make love 19) Make out 20) Roll in the hay 21) Screw 22) Sleep with 23) To commit fornication 1) Bed hop 
vaulted or arched
• (v. i.) To commit fornication; to have unlawful sexual intercourse. • (a.) Alt. of Fornicated
1. Vaulted or arched; resembling a fornix. ... Origin: L. Fornicatus, arched, fr. Fornix, vault, arch ... 2. To have sexual intercourse. ... Origin: see fornication ... (05 Mar 2000) ... 
For'ni·cate intransitive verb [ Latin fornicatus , past participle of fornicari to fornicate, from fornix , -icis , a vault, a brothel in an underground vault.] To commit fornication; to have unlawful sexual intercourse. 
Arched.
Type: Term Pronunciation: fōr′ni-kāt Definitions: 1. Vaulted or arched; resembling a fornix. 2. To have sexual intercourse.
[v] - have sex without being married
verb have sex without being married
to commit fornication.