13 letters
- photoengraved26
- photoengraver25
- photoengraves25
- photographers25
- photographies25
- photographing28
- photogravures25
- physiographer27
- physiographic30
- pictographies26
- planographies25
- plethysmogram29
- polarographic27
- polygraphists26
- pornographers24
- pornographies24
- postgraduates20
- preprograming27
- preprogrammed28
- programmables28
- progressional20
- progressively25
- progressivism25
- progressivist22
- progressivity24
- prosopography28
- pseudepigraph28
- radiographies21
- radiographing24
- reaggregating22
- reaggregation20
- rechoreograph25
- redintegrated18
- redintegrates17
- regretfulness21
- reintegrating19
- reintegration17
- reintegrative20
- rephotographs25
- reprogramming27
- reprographers23
- reprographics26
- reprographies23
- resegregating20
- resegregation18
- retrogressing18
- retrogression16
- retrogressive19
- roentgenogram22
- scenographers24
- scenographies24
- scintigraphic27
- seismographer23
- seismographic26
- semievergreen23
- spectrographs26
- spectrography28
- sphygmographs32
- stenographers21
- stenographies21
- stereographed21
- stereographic23
- stratigraphic23
- stylographies23
- subparagraphs27
- supergraphics27
- switchgrasses23
- telegrapheses21
- telegraphists21
- thermographic28
- topographical27
- transgressing19
- transgression17
- transgressive20
- transgressors16
- transmigrated20
- transmigrates19
- transmigrator19
- typographical29
- undergraduate20
- undergrounder21
- ungrammatical27
- unprogressive24
- upgradability26
- uranographies22
- videographers25
- videographies25
- xylographical34
- zoogeographer31
- zoogeographic34