nerveless vs coolheaded

nerveless and coolheaded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
nerveless	No	Yes	No	No
coolheaded	No	Yes	No	No

As adjectives, nerveless and coolheaded are synonyms defined as:

nerveless and coolheaded: marked by calm self-control (especially in trying circumstances); unemotional

Other synonyms of nerveless include cool.

nerveless (adjective)	coolheaded (adjective)
marked by calm self-control (especially in trying circumstances); unemotional	marked by calm self-control (especially in trying circumstances); unemotional
lacking strength