1. comforter, sympathiser, sympathizer

commiserates with someone who has had misfortune

• sympathiser
• sympathizer

2. allayer, comforter, reliever

a person who reduces the intensity (e.g., of fears) and calms and pacifies

Example Sentences:
'a reliever of anxiety'
'an allayer of fears'

• allayer
• reliever

3. comfort, comforter, puff, quilt

bedding made of two layers of cloth filled with stuffing and stitched together

• comfort
• puff
• quilt

4. baby's dummy, comforter, pacifier, teething ring

device used for an infant to suck or bite on

• baby's dummy
• pacifier
• teething ring