Synonyms of cuddle up
nestleIf you nestle or are nestled somewhere, you move into a comfortable position, usually by pressing against someone or against something soft.
• The new puppy nestled in her lap.
snuggleIf you snuggle somewhere, you settle yourself into a warm, comfortable position, especially by moving closer to another person.
• I snuggled down in the big, comfortable seat.
Thesaurus for cuddle up from the Collins English Thesaurus