Synonyms of the word 
IRRESPECTIVE → DISREGARDING - DISREGARDLESS - REGARDLESS
irrespective
- adj. heedless, regardless.
- adj. Without regard for conditions, circumstances, or consequences; unbiased; independent; impartial.
- adj. (obsolete) disrespectful.
disregarding
- v. present participle of disregard.
disregardless
- adv. (nonstandard) Regardless.
regardless
- adj. Having no regard; heedless; careless.
- adv. Without attention to warnings or indications of bad consequences.
- prep. Paying no attention to; regardless of.
If you are interested in words, visit the following sites :
- wiktionary.org/irrespective For complete definition of a word
- 1word.ws/irrespective to play with words, suffixs, prefixs, etc.