The prefix 'bi' generally means two or twice. Words that have the prefix 'bi' are:

bicoastal

biannual

biannually

bias

biased

biases

biasing

biathlon

biathlons

bicameral

bicameralism

bicarb

bicarbonate

bicarbonates

bicarbs

bicentenaries

bicentenary

bicentennial

bicentennials

bicep

biceps

bicolor

biconcave

biconvex

bicuspid

bicuspids

bicycle

bicycled

bicycler

bicyclers

bicycles

bicycling

bicyclist

bicyclists

bidirectional

bidirectionally

biennial

biennially

biennials

biennium

bienniums

bifocal

bifocals

bifunctional

bifurcate

bifurcated

bifurcates

bifurcating

bifurcation

bifurcations

bilabial

bilabials

bilateral

bilaterally

bilinear

bilingual

bilingualism

bilingually

bilinguals

bimetallic

bimetallics

bimetallism

bimodal

bimonthlies

bimonthly

binaries

binary

binocular

binoculars

binodal

binomial

bionic

bionically

bionics

biopic

biopics

biopsied

biopsies

biopsy

bipartisan

bipartisanship

bipartite

biped

bipedal

bipedalism

bipeds

biplane

biplanes

bipod

bipolar

bipolarity

biracial

bisect

bisected

bisecting

bisection

bisections

bisector

bisectors

bisects

bisexual

bisexuality

bisexually

bisexuals

bitonal

bivalent

bivalve

bivalves

biweekly

biyearly
bipartisan, bilateral, biracial, bisexual, biped, bicycle, binoculars