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8-Letter Words Starting with BI

For puzzles requiring BI prefixes, here are all 8-letter word options. Popular examples include BIACETYL, BIANNUAL, BIASEDLY, plus BIASNESS, BIASSING, BIATHLON and many more. Each word links to its dictionary entry for deeper understanding.

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189 words

Word	Length	Syllables
biacetyl	8	3
biannual	8	2
biasedly	8	3
biasness	8	2
biassing	8	2
biathlon	8	2
bibcocks	8	2
bibelots	8	3
biblical	8	3
biblists	8	2
bibulous	8	3
bicaudal	8	3
bicepses	8	3
bichrome	8	2
bickered	8	3
bickerer	8	3
bicolors	8	3
bicolour	8	3
biconvex	8	3
bicornes	8	3
bicuspid	8	3
bicycled	8	3
bicycler	8	3
bicycles	8	3
bicyclic	8	3
bidarkas	8	3
bidarkee	8	2
biddable	8	2
biddably	8	3
biddings	8	2
bidental	8	3
bielding	8	2
biennale	8	2
biennial	8	2
biennium	8	2
bifacial	8	3
bifidity	8	4
bifocals	8	3
biforate	8	3
biforked	8	3
biformed	8	3
bigamies	8	3
bigamist	8	3
bigamous	8	3
bigarade	8	3
bigaroon	8	3
bigeminy	8	4
bigfoots	8	2
biggings	8	2
bigheads	8	2
bighorns	8	2
bighting	8	2
bigmouth	8	2
bignonia	8	3
bihourly	8	3
bijugate	8	3
bijugous	8	3
bikeways	8	3
bikinied	8	3
bilabial	8	3
bilander	8	3
bilayers	8	2
bilberry	8	3
bilgiest	8	2
bilinear	8	3
billable	8	2
billbugs	8	2
billeted	8	3
billeter	8	3
billfish	8	2
billfold	8	2
billhead	8	2
billhook	8	2
billiard	8	2
billings	8	2
billions	8	2
billowed	8	3
billycan	8	3
bilobate	8	3
bilsteds	8	2
biltongs	8	2
bimanous	8	3
bimanual	8	3
bimensal	8	3
bimester	8	3
bimetals	8	3
bimethyl	8	3
bimorphs	8	2
binaries	8	3
binately	8	4
binaural	8	3
bindable	8	2
bindings	8	2
bindweed	8	2
bingeing	8	2
binnacle	8	2
binocles	8	3
binomial	8	3
bioassay	8	2
biochips	8	2
biocidal	8	3
biocides	8	3
bioclean	8	2
biocycle	8	2
bioethic	8	2
biogases	8	3
biogenic	8	3
bioherms	8	2
biologic	8	3
biolyses	8	3
biolysis	8	3
biolytic	8	3
biometry	8	3
bionomic	8	3
bioplasm	8	2
biopsied	8	2
biopsies	8	2
bioscope	8	2
bioscopy	8	3
biotechs	8	2
biotical	8	3
biotites	8	3
biotitic	8	3
biotopes	8	3
biotoxin	8	3
biotrons	8	2
biotypes	8	3
biotypic	8	3
biovular	8	3
biparous	8	3
biparted	8	3
biphasic	8	3
biphenyl	8	3
biplanes	8	3
biracial	8	3
biradial	8	3
biramose	8	3
biramous	8	3
birching	8	2
birdbath	8	2
birdcage	8	2
birdcall	8	2
birdfarm	8	2
birdings	8	2
birdlike	8	2
birdlime	8	2
birdseed	8	2
birdseye	8	1
birdshot	8	2
birdsong	8	2
birettas	8	3
birlings	8	2
birretta	8	3
birrotch	8	2
birthday	8	2
birthing	8	2
biscuits	8	2
bisected	8	3
bisector	8	3
bisexual	8	3
bishoped	8	3
bismuths	8	2
bisnagas	8	3
bistered	8	3
bistorts	8	2
bistoury	8	3
bistroic	8	2
biteable	8	2
bitewing	8	3
bitingly	8	3
bitstock	8	2
bittered	8	3
bitterer	8	3
bitterly	8	3
bitterns	8	2
bittiest	8	2
bittings	8	2
bittocks	8	2
bitumens	8	3
biunique	8	2
bivalent	8	3
bivalved	8	3
bivalves	8	3
bivinyls	8	3
bivouacs	8	2
biweekly	8	3
biyearly	8	2
bizarres	8	3
biznagas	8	3

FAQs

Are BI-starting words common?
BI is a frequent start; probing vowel swaps after BI quickly narrows options.

Is this list good for crosswords?
Yes—filter by length mentally and scan definitions when available.