Solutions to Tuesday's extra Words within Word Sudoku puzzles

I gave you 18 interactive Word Sudoku puzzles Tuesday, all but the last two using six of the seven letters in the words TV REINS. The last two puzzles used ALL the letters.

Common 6-letter words:
1. TV REINS –N: RIVETS
2. TV REINS –N: STRIVE
3. TV REINS –R: INVEST
4. TV REINS –S: INVERT
5. TV REINS –V: INSERT
6. TV REINS –V: INTERS
7. TV REINS –V: NITERS
8. TV REINS –V: TRINES

Uncommon/obsolete 6-letter words:
9. TV REINS –N: TREVIS
10. TV REINS –N: VERIST
11. TV REINS –N: STIVER
12. TV REINS –S: VIRENT
13. TV REINS –T: VERSIN
14. TV REINS –V: SINTER
15. TV REINS –V: ESTRIN
16. TV REINS –V: TRIENS

7-letter anagrams:
17. TV REINS: INVERTS
18. TV REINS: STRIVEN

Thanks,
--Dave