Synonyms of the word 
OFTEN → FREQUENTLY - MUCH - OFT - OFTENTIMES - OFTTIMES
often
- adv. Frequently, many times.
- adj. (archaic) Frequent.
frequently
- adv. At frequent intervals.
- adv. (mathematics, of a sequence) For infinitely many terms of the sequence.
much
- adv. To a great extent.
- adv. Often; frequently.
- pron. A large amount or great extent.
oft
- adv. (chiefly poetic, dialectal, and in combination) often; frequently; not rarely; many times.
oftentimes
- adv. Frequently.
- adv. Repeatedly.
ofttimes
- adv. often; frequently.
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