Wordy Wednesday 602: Sudokurostic

WORDY WEDNESDAY #600
PENT WORDS 120 (answer)

Here is the answer to this puzzle. If you still wish to solve it yourself, please go here for the normal version of the puzzle, or here for the easier version of the puzzle. Here's a list of people who solved it:
Bonnie Veenschoten **
Cathy Bowen **
Cindy Heisler **
Cole Kendall **
Derek Allen **
James Haddad **
Joe Bernard **
Michael Lebowitz **
Pavel Curtis **
Randy Rogers **
Russ Kale **
Kevin Orfield **
Patrick Jordan *
Ryan Faley **
Sam Levitin **

WORDY WEDNESDAY #601
FOXGERYPTICS 19 (hint)

As of this writing, 14 people have solved this puzzle. Haven't solved it yet? Here's an easier version. Send your answers to glmathgrant[at]gmail[dot]com within the next week to appear on the solvers list and be recognized for your puzzle prowess. Good luck, solvers!

WORDY WEDNESDAY #602
SUDOKUROSTIC
(click here for a PDF version)

This puzzle contains a word suggested by patron M. Sean Molley. Support me on Patreon at the Super Fan level ($5/month) and solve the monthly Patron Puzzle for a chance to suggest a seed word for a future puzzle, or at the Ultra Fan level ($20/month) to suggest one seed word every month!
Solve the clues by writing one letter per blank; the clues are alphabetized by the answers as a solving aid. Transfer the letters to the corresponding spaces and fill in the remaining spaces to form a valid sudoku, but with 9 different letters instead of numbers. (Each row, column, and box must contain those 9 letters in some order.) Treat the finished grid as a word search and look for a 6-letter word, which is this puzzle’s final answer.

Register __ __ __ __ __ __
         E1 D6 F6 I7 I1 B6
The “p” in the physics equation p=mv __ __ __ __ __ __ __ __
                                     C1 C9 D2 I9 I3 G9 A3 F4
Orange-clad ninja in a popular manga and anime __ __ __ __ __ __
                                               A1 A9 D8 H4 F2 D4
Feeling of intense fear __ __ __ __ __ __
                        A5 H2 I5 A7 H6 B2
Franklin D. Roosevelt’s third vice president __ __ __ __ __ __
                                             B8 G1 F8 E9 H8 B4

COMING NEXT WEEK. . .

* What's a 5-letter word for "Mammal known for holding hands while sleeping"?

Submit your answers to glmathgrant[at]gmail[dot]com. Until next time, happy solving!