13 letters
- oversaturates18
- oversecretion21
- oversensitive22
- overseriously21
- overservicing27
- overshadowing26
- overslaughing26
- overspeculate25
- overspreading24
- overstability23
- overstatement21
- overstimulate22
- overstraining21
- overstressing20
- overstretched23
- overstretches22
- oversubscribe27
- oversupplying30
- oversweetened22
- oversweetness21
- overtalkative26
- overtaxations25
- overtightened23
- overtreatment21
- overutilizing31
- overvaluation24
- overweeningly27
- overweighting27
- overwintering24
- overwithholds26
- overzealously31
- participative26
- passivenesses21
- pensivenesses22
- peradventures23
- performatives26
- perseverances24
- perseverating23
- perseveration21
- perseveringly26
- perspectively29
- pervasiveness25
- pervertedness22
- photoemissive25
- photoengraved26
- photoengraver25
- photoengraves25
- photonegative25
- photopositive25
- plaintiveness23
- postoperative23
- precipitative26
- preconvention26
- predeliveries22
- predicatively27
- prefigurative26
- premeditative24
- preparatively26
- prepositively26
- preservatives24
- presumptively30
- preuniversity24
- preventatives25
- primitiveness24
- progressively25
- prohibitively28
- proliferative24
- promotiveness24
- prospectively29
- proventriculi26
- provocatively30
- pulverization32
- purposiveness25
- qualitatively31
- quarterstaves27
- radioactively24
- ratiocinative21
- rebarbatively26
- receiverships25
- receptiveness24
- recessiveness21
- reciprocative26
- reclusiveness23
- reconversions22
- reconveyances27
- recriminative24
- recursiveness22
- redevelopment26
- rediscoveries21
- rediscovering24
- reductiveness23
- reduplicative26
- reflexiveness29
- reintegrative20
- reinvestigate20
- reinvestments22
- reiteratively20
- rejuvenations29
- rejuvenescent32
- remonstrative21
- reproductives25
- repulsiveness23
- resistiveness18
- restivenesses18
- restrictively23
- resuscitative21
- retentiveness19
- retributively24
- retroactively23
- retrogressive19
- retrospective23
- retroversions18
- revegetations20
- reverberantly24
- reverberating23
- reverberation21
- reverberative24
- reverberatory22
- reverentially22
- reversibility23
- seclusiveness23
- secretiveness21
- seductiveness23
- selectiveness22
- semievergreen23
- sensitiveness19
- significative26
- silverberries21
- silverinesses19
- slaveholdings25
- sovereignties20
- speculatively28
- suasivenesses19
- subgovernment28
- subordinative23
- substantively25
- subventionary25
- subversionary24
- superachiever26
- superlatively25
- superventions23
- surveillances24
- talkativeness23
- tentativeness19
- tergiversated20
- tergiversates19
- tergiversator19
- terminatively24
- transgressive20
- transmutative22
- transvestisms21
- transvestites18
- unadventurous23
- unassertively22
- uncompetitive28
- uncooperative25
- undeliverable25
- underachieved26
- underachiever25
- underachieves25
- unimaginative25
- uninformative26
- uninstructive24
- universalisms23
- universalists20
- universalized30
- universalizes29
- universalness21
- unobtrusively26
- unprogressive24
- unrecoverable26
- unselectively26
- vegetarianism23
- velarizations28
- velociraptors24
- vendibilities23
- venerableness23
- venipunctures27
- ventriloquial30
- ventriloquies29
- ventriloquism32
- ventriloquist29
- ventriloquize38
- ventrolateral20
- venturesomely25
- venturousness21
- veraciousness22
- verbalization31
- verbigeration23
- verbosenesses21
- verifiability26
- verifications24
- verisimilarly24
- veritableness22
- vermiculation26
- vernacularism26
- vernalization29
- versatileness19
- versatilities18
- versification24