Here is a list of twenty British birds.   Apart from an S plural, what other letters can you find which hook onto the front or back of the bird’s name to make other words e.g. a Y can be added to GULL to make GULLY.    Just under half of the 57 new words made by adding a letter are also common English words, but some definitely are not !  FYI the 57 words don't include the plurals.

AUK                       COOT                    CROW                   DOVE                    EAGLE

EGRET                   EIDER                    HEN                       KITE                       LARK

OWL                      RAIL                       RAVEN                  ROBIN                   ROOK

RUFF                     SWAN                   TEAL                      TERN                     TIT

 

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Answers here (please note, the plurals  eg AUKS, COOTS are not listed)
All the names take an S a s the plural.

bauk, cauk, jauk, wauk

AUK

 

scoot

COOT

 

scrow

CROW

crowd, crown

 

DOVE

doved, doven, dover

beagle, teagle

EAGLE

eagled, eaglet

regret

EGRET

 

deider

EIDER

 

shen, then, when

HEN

hend, hent

skite

KITE

kited, kiter

 

LARK

larky

bowl, cowl, dowl, fowl, gowl, howl, jowl, nowl, sowl, yowl

OWL

owly

brail, drail, frail, grail, trail

RAIL

raile

craven, graven

RAVEN

 

 

ROBIN

robing

brook, crook, drook

ROOK

 rooky

gruff

RUFF

ruffe

 

SWAN

swang, swank

steal

TEAL

 

stern

TERN

terne

 

TIT

tite, titi