Thesaurus / one-track mind
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLE SENTENCES FROM THE WEB

"Thank God that thing had a one-track mind, and was concentrating on the spider," said Jim, with a rather humorless laugh.

Once his one-track mind got to functioning on a certain objective it seldom digressed.

WORDS RELATED TO ONE-TRACK MIND

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.