tec vs investigator

tec and investigator both are nouns.

Word	Noun	Adjective	Verb	Adverb
tec	Yes	No	No	No
investigator	Yes	No	No	No

As nouns, tec and investigator are synonyms defined as:

Other synonyms of tec include detective, police detective.

tec (noun)	investigator (noun)
a police officer who investigates crimes	someone who investigates
	a scientist who devotes himself to doing research
	a police officer who investigates crimes