Synonyms of the word 
DELETERIOUS → HARMFUL - HURTFUL - INJURIOUS
deleterious
- adj. Harmful often in a subtle or unexpected way.
harmful
- adj. of a kind likely to be damaging; injurious.
hurtful
- adj. Tending to impair or damage; injurious; mischievous; occasioning loss or injury.
- adj. Tending to hurt someone's feelings; insulting.
injurious
- adj. Causing physical harm or injury; harmful, hurtful.
- adj. Causing harm to one's reputation; invidious, defamatory, libelous, slanderous.
If you are interested in words, visit the following sites :
- wiktionary.org/deleterious For complete definition of a word
- 1word.ws/deleterious to play with words, suffixs, prefixs, etc.