Drop one letter from the first answer to get the second. All beginning words are seven letters. No anagramming required.
-1. a wave -> a lab container
-2. change or vary the pitch of -> contaminate
-3. speech -> allocate
-4. indignity -> a failure or interruption in use or functioning
-5. disbeliever -> related to putrefaction
-6. antiquated washer type -> "Seventeen" band
-7. introduce -> bear a grudge
-8. food embellishment -> gaudy
-9. use up -> eradicate
-10. condense -> dental appliance