9 letters
- precancel20
- precocial19
- precoding19
- precoital16
- prefacing21
- prelaunch20
- preschool18
- procaines16
- prolactin17
- prolamine17
- prologing18
- prologize24
- prolonged17
- prolonger16
- prolonges16
- pronuclei18
- proscenia16
- pyrogenic20
- rachillae16
- raincheck22
- rappeling19
- rationale11
- recalling17
- recapping21
- recoaling16
- recocking22
- recoiling16
- recoinage15
- reconcile17
- recooking19
- recopying20
- recouping19
- recycling21
- reechoing17
- regionals13
- relapsing16
- reloading14
- reloaning14
- relocking20
- relooking17
- repacking22
- repealing16
- replacing19
- replating16
- replaying18
- replicons17
- repolling17
- rescaling16
- reshaping17
- respacing18
- retooling13
- saccharin18
- scarphing20
- schooling18
- scorching20
- scrooping18
- searching17
- selachian16
- serologic15
- shearling15
- spanglier16
- spherical18
- sporangia15
- technical19
- theogonic17
- theologic17
- theriacal15
- threaping17
- tochering17
- trachling18