'Noose' has a similar (though broader) meaning to 'lasso' and 'lariat'.
Bookworm is a common 5-letter synonym for someone who reads a lot.
groan
horse
amble
smart
start
glare
How about: 'rogue'
brush
Squat is a five-letter synonym for sit.
Zane Grey Theater - 1956 Lariat 1-5 was released on: USA: 2 November 1956