There are a total of 304 9-letter words starting with 'si', and the number may vary in different dictionaries. You can specify the dictionary and order.
- sialidans 12
- sialidase 11
- sialogram 12
- sialolith 12
- siamesing 12
- siamezing 21
- sibilance 17
- sibilancy 16
- sibilants 14
- sibilated 14
- sibilates 13
- sibilator 11
- siblicide 17
- sibylline 17
- siccative 19
- siccities 13
- siciliana 14
- siciliane 11
- siciliano 14
- sickeners 17
- sickening 20
- sickishly 21
- sickleman 17
- sicklemen 17
- sicklemia 20
- sicklemic 19
- sickliest 17
- sicklying 22
- sicknotes 17
- sicknurse 15
- sickrooms 19
- sidalceas 14
- siddhuism 16
- sidearmed 14
- sidearmer 13
- sidebands 15
- sideboard 14
- sidebones 12
- sideburns 15
- sidechain 16
- sidechair 15
- sidecheck 21
- sidedness 12
- sidedress 11
- sidefoots 13
- sidehills 14
- sidekicks 21
- sidelamps 17
- sidelight 15
- sidelined 13
- sideliner 12
- sidelines 12
- sidelocks 16
- sidemeats 12
- sidenotes 11
- sidepaths 15
- sidepiece 16
- sideplate 14
- siderated 11
- siderates 10
- siderites 10
- sideritic 13
- sideroads 11
- sideroses 10
- siderosis 10
- siderotic 12
- sideshoot 13
- sideshows 15
- sideslips 14
- sidespins 14
- sidesplit 12
- sidesteps 13
- sideswipe 16
- sidetrack 17
- sidetrips 13
- sideviews 17
- sidewalks 18
- sidewalls 15
- sidewards 14
- sidewheel 16
- sidewinds 15
- sidlingly 14
- siemenses 11
- sierozems 21
- sievelike 18
- siffleurs 17
- siffleuse 15
- siftingly 16
- sighingly 17
- sightable 15
- sightings 16
- sightless 14
- sightlier 14
- sightline 15
- sightseen 14
- sightseer 13
- sightsees 13
- sightsman 15
- sightsmen 15
- sigillary 13
- sigillata 13
- sigillate 10
- sigmating 13
- sigmation 12
- sigmatism 14
- sigmatron 12
- sigmoidal 16
- signalbox 23
- signalers 13
- signaling 16
- signalise 13
- signalize 22
- signalled 15
- signaller 14
- signalman 17
- signalmen 17
- signaries 12
- signatory 14
- signature 13
- signboard 16
- signeting 15
- signeurie 10
- signieurs 10
- significs 18
- signified 16
- signifier 15
- signifies 15
- signorial 10
- signorias 10
- signories 12
- signorina 13
- signorine 13
- signorini 10
- signorino 10
- signposts 15
- silageing 11
- silastics 11
- silencers 14
- silencing 17
- silentest 11
- silicated 12
- silicates 13
- siliceous 14
- silicides 14
- silicious 14
- siliciums 17
- siliconed 15
- silicones 14
- silicoses 13
- silicosis 13
- silicotic 16
- siliculae 15
- siliculas 11
- silicules 11
- siliquose 20
- siliquous 18
- silkalene 13
- silkaline 16
- silkening 14
- silkiness 15
- silkmoths 19
- silkoline 16
- silktails 13
- silkweeds 18
- silkworms 20
- sillabubs 18
- silladars 10
- sillibubs 18
- silliness 12
- siloxanes 18
- silphiums 16
- siltation 11
- siltstone 11
- silurists 9
- siluroids 12
- silverers 14
- silvereye 16
- silverier 12
- silvering 17
- silverise 12
- silverize 21
- silvertip 14
- simarouba 13
- simarubas 16
- simazines 22
- similarly 16
- similised 12
- similises 11
- similized 21
- similizes 20
- simmering 18
- simoleons 14
- simoniacs 16
- simonious 11
- simonised 12
- simonises 11
- simonists 13
- simonized 23
- simonizes 22
- simpatico 18
- simperers 15
- simpering 18
- simplesse 13
- simpleton 17
- simplexes 23
- simplices 19
- simplicia 19
- simplings 14
- simplisms 19
- simpliste 13
- simplists 16
- simulacra 17
- simulacre 17
- simulants 15
- simulated 15
- simulates 14
- simulator 14
- simulcast 17
- simuliums 13
- sinapisms 16
- sincerely 16
- sincerest 13
- sincerity 15
- sincipita 16
- sinciputs 17
- sinecures 14
- sinewaves 17
- sinewiest 12
- sinewless 14
- sinfonias 14
- singalong 16
- singingly 14
- singledom 17
- singleton 14
- singleuse 14
- singlings 11
- singsongs 15
- singsongy 17
- singspiel 16
- singulars 14
- singulary 13
- singultus 10
- sinicised 12
- sinicises 11
- sinicized 23
- sinicizes 22
- sinistral 11
- sinkholes 17
- sinlessly 14
- sinnering 10
- sinningia 10
- sinologue 14
- sinopises 11
- sinopites 11
- sintering 13
- sinuately 12
- sinuating 14
- sinuation 9
- sinuosity 13
- sinuously 15
- sinusitis 11
- sinuslike 13
- sinusoids 12
- siphonage 17
- siphonate 14
- siphonets 14
- siphoning 18
- siphuncle 20
- sirenians 11
- sirenised 10
- sirenises 9
- sirenized 19
- sirenizes 18
- sirnaming 12
- sironised 10
- sironises 9
- sironized 19
- sironizes 18
- sirupiest 11
- sirventes 14
- sissified 13
- sissiness 10
- sissyness 12
- sistering 12
- sitarists 9
- sitatunga 13
- sitiology 13
- sitkamers 16
- sittellas 11
- situating 13
- situation 11
- situtunga 10
- sitzkrieg 24
- sitzmarks 25
- siwashing 17
- sixpences 23
- sixscores 18
- sixteener 16
- sixteenmo 20
- sixteenth 19
- sixtieths 18
- sixtyfold 23
- sizarship 23
- sizzlings 28
There are 304 9-letter words starting with "si" in the well-known word game dictionary, 189 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 280 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 197 in the Words with Friends (WWF) dictionary.
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