10 letters
- initiation12
- initiative15
- initiators11
- initiatory13
- innervated17
- innervates16
- innovation17
- innovative20
- innovators16
- innovatory18
- inordinate13
- integrated14
- integrator13
- intenerate12
- interacted15
- interbreed15
- interceder15
- interested12
- interfaced18
- interfaith16
- interfered15
- interferer14
- interferes14
- interferon15
- interfiber17
- interfiled16
- intergrade14
- intergraft16
- interionic15
- interleave16
- interlined14
- interliner13
- intermedin16
- internodal14
- internodes13
- interocean15
- interorgan14
- interpoint15
- interregna14
- interrenal13
- interrogee13
- intertidal13
- intertrial12
- intertroop14
- intertwine15
- intervened17
- intervener16
- intervenes16
- intervenor16
- interweave18
- interwoven19
- intimation15
- intimidate15
- intolerant13
- intonation13
- intreating14
- introverts15
- inverities15
- inveterate15
- invigorate17
- invitation16
- invitatory17
- invocation19
- iodinating15
- iodination13
- ionization21
- ironfisted15
- irredentas12
- irrelative15
- irrelevant16
- irreverent15
- irridentas12
- irrigation13
- irritating13
- irritation11
- irritative14
- iterations11
- itinerants12
- itinerated12
- itinerates11
- jardiniere21
- levitation16
- literation12
- marionette14
- meditation15
- meditative18
- moderation15
- motivation18
- nationwide16
- nativities15
- negotiated14
- negotiator13
- nervations16
- nifedipine19
- nitrations12
- nitrifiers14
- nitrofuran16
- nominative19
- nonadmirer16
- nonbreeder16
- nondeviant18
- nondrivers17
- nonfederal17
- nonreactor15
- nonreaders13
- nonrioters12
- nonstarter12
- nonsteroid13
- nontrivial17
- nonveteran17
- novitiates15
- oceanfront18
- officiated20
- offprinted21
- ordainment16
- ordinarier12
- ordinaries12
- ordination13
- orientated12
- orientates11
- orienteers11
- originated14
- originator13
- ornamented16
- ovaritides15
- overaction18
- overbeaten18
- overbetted18
- overdaring18
- overdirect18
- overdrafts18
- overdriven20
- overeaters14
- overeating17
- overedited16
- overemoted18
- overextend23
- overfeared18
- overheated17
- overinform21
- overmanned20
- overpotent18
- overrating17
- overridden17
- overriding18
- overruffed22
- overstated15
- overstrain15
- overstride15
- overstrode15
- overtiring17
- overtoiled16
- overtraded16
- overtrades15
- overtrains15
- overtreats14
- overturned17
- overwetted18
- overwinter18
- pendentive20
- penetrated15
- perennated16
- perforated17
- peridotite14
- peroration14
- petitioned15
- petitioner14
- pianoforte17
- pinnatifid19
- pretrained15
- pretreated14
- prettified17
- prettifier16
- prevenient19
- prevention19
- protonated15
- pteranodon16
- radiometer14
- rainforest14
- rattooning14
- readorning15
- reaffirmed20
- reafforest16
- reanointed13
- reattained12
- recitation14
- recitative17
- recitativi17
- recitativo17
- reconvened20
- recreation14
- recreative17
- redecorate14
- redefining18
- redivision16
- redrafting17
- reeditions12
- reenforced18
- reengraved18
- reentering14