Regardless synonyms such as discounting, (come) rain or shine, careless of/about, and despite. Regardless is an adverb, and its antonyms are mindful of and heedful of.
Another word for Regardless
1. anyway
2. irrespective of
- without regard to
- without reference to
- without consideration of
- unmindful of
- unconcerned about
- setting aside
- notwithstanding
- no matter
- negligent of
- irrespective of
- irregardless of
- in spite of
- indifferent to
- ignoring
- heedless of
- for all
- disregarding
- discounting
- despite
- careless of/about