Synonyms of 'seesaw'
alternateDictionary, swing, fluctuate
The stock-market see-sawed up and down.
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Her gentle moods alternated with calmer states.
If something fluctuates, it changes a lot in an irregular way.
Body temperatures can fluctuate when you are ill.
Thesaurus for seesaw from the Collins English Thesaurus
A seesaw is a long board which is balanced on a fixed part in the middle. To play on it, a child sits on each end, and when one end goes up, the other goes down.