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Words starting with BI (9-letter)

A curated list of 9-letter words tailored to this exact pattern. When a clue points to BI starts, alternate vowel patterns and common blends after the prefix. For example: biacetyls, biathlete, biathlons.

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140 words

Word	Length	Syllables
biacetyls	9	3
biathlete	9	2
biathlons	9	2
biaxially	9	3
bibberies	9	3
biblicism	9	3
biblicist	9	3
bibliotic	9	3
bicameral	9	4
bicipital	9	4
bickerers	9	3
bickering	9	3
bicoastal	9	3
bicolored	9	4
bicolours	9	3
biconcave	9	3
bicuspids	9	3
bicyclers	9	3
bicycling	9	3
bicyclist	9	3
bidarkees	9	3
biennales	9	3
biennials	9	2
bienniums	9	2
bifilarly	9	4
bifurcate	9	3
bigamists	9	3
bigarades	9	4
bigaroons	9	3
bigeminal	9	4
bigeneric	9	4
bigheaded	9	3
bigmouths	9	2
bignesses	9	3
bignonias	9	3
bigotedly	9	4
bigotries	9	3
bijection	9	3
bijective	9	3
bilabials	9	3
bilabiate	9	3
bilanders	9	3
bilateral	9	4
bilharzia	9	3
bilingual	9	3
biliously	9	3
bilirubin	9	4
billabong	9	3
billboard	9	2
billeters	9	3
billeting	9	3
billfolds	9	2
billheads	9	2
billhooks	9	2
billiards	9	2
billionth	9	2
billowier	9	3
billowing	9	3
billycans	9	3
billycock	9	3
bimesters	9	3
bimethyls	9	3
bimonthly	9	3
binderies	9	3
bindingly	9	3
bindweeds	9	2
binnacles	9	3
binocular	9	4
binomials	9	3
bioactive	9	2
bioassays	9	2
biocycles	9	3
bioethics	9	2
biogasses	9	3
biogenies	9	3
biogenous	9	3
biography	9	3
biohazard	9	3
biologics	9	3
biologies	9	3
biologism	9	3
biologist	9	3
biomasses	9	3
biometric	9	3
bionomics	9	3
bionomies	9	3
bioplasms	9	2
biopsying	9	2
biorhythm	9	2
biosafety	9	4
bioscopes	9	3
biosensor	9	3
biosocial	9	3
biosphere	9	2
biotoxins	9	3
bipartite	9	3
bipedally	9	4
biphenyls	9	3
bipinnate	9	3
bipyramid	9	4
birdbaths	9	2
birdbrain	9	2
birdcages	9	3
birdcalls	9	2
birdfarms	9	2
birdhouse	9	2
birdieing	9	2
birdlimed	9	3
birdlimes	9	3
birdseeds	9	2
birdseyes	9	2
birdshots	9	2
birdsongs	9	2
birrettas	9	3
birthdate	9	2
birthdays	9	2
birthmark	9	2
birthrate	9	2
birthroot	9	2
birthwort	9	2
bisecting	9	3
bisection	9	3
bisectors	9	3
bisexuals	9	3
bishoping	9	3
bishopric	9	3
bismuthic	9	3
bisontine	9	3
bisulfate	9	3
bisulfide	9	3
bisulfite	9	3
bitewings	9	3
bitstocks	9	2
bitterest	9	3
bittering	9	3
bitterish	9	3
bivalents	9	3
bivariate	9	3
bivouacks	9	2
bizarrely	9	4

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.