Animals & plants

worm

Source:*čьrvьProto-Slaviccertain

BCS crv has no vowel at all: the r is the syllable.

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English

worm

Polish

robak

ˈrɔbak

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In all five languages

BCS script

Latin under Cyrillic

Russian
червя́кčervjak
tɕɪrˈvʲakinherited
червь is the bookish base form.
Ukrainian
черв’я́кčervʼjak
tʃɛrʋˈjakinherited
хробак, the cognate of Polish robak, is also common.
Polish
robak
ˈrɔbakdifferent word · Polish, from older chrobak, of expressive origin
Polish czerw, the cognate, is a maggot.
Czech
červ
tʃɛrfinherited
Bosnian-Croatian-Serbian
crvцрв
tsr̩vinherited
English
worm