9 letters
- proactive19
- procaines16
- procreant16
- profanity18
- profiting18
- prolactin17
- proscenia16
- prostatic15
- protamine16
- prothetic17
- protistan13
- protonate13
- psoriatic15
- reactions13
- reappoint16
- reception16
- recipient16
- recontact16
- redaction14
- refection16
- refitting15
- reflation14
- reliction14
- repotting15
- reptilian14
- retinitis10
- sincipita16
- spectator15
- stationer10
- striation10
- tackifier19
- taconites13
- tiptoeing15
- titration10
- topiaries12
- tractions13
- tradition11
- transfect16
- trepidant14
- tretinoin11
- triatomic15
- trichinae15
- triclinia14
- tricotine13
- trifectas15
- trinities10
- triptanes13
- triticale13
- tropistic15
- vaporetti16
- ventifact20
- vitiation14