lineman vs electrician

lineman and electrician both are nouns.

Word	Noun	Adjective	Verb	Adverb
lineman	Yes	No	No	No
electrician	Yes	No	No	No

As nouns, lineman and electrician are synonyms defined as:

lineman and electrician: a person who installs or repairs electrical or telephone lines

Other synonyms of lineman include linesman.

lineman (noun)	electrician (noun)
(American football) the position of a player on a football team who is stationed on the line of scrimmage	a person who installs or repairs electrical or telephone lines
one of the players on the line of scrimmage
a person who installs or repairs electrical or telephone lines
the surveyor who marks positions with a range pole