What are some doublet words?

Answer 1

Doublets change a word in a series of steps to make a new word.

Make head into tail

H E A D

h e a l

t e a l

t e l l

t a l l

T A I L

Make door into lock

D O O R

b o o r

b o o k

l o o k

L O C K

Put INK into PEN

Turn OIL into GAS

Evolve FISH into BIRD

Make FIRE produce HEAT