5
lengthwise(adjective, adverb, longitudinally)
2
lengthways
2
straight on(verb, expression, adjective, phrasal verb, lengthwise)
1
axial
1
end-to-end
1
endlong(adverb, across, lengthwise)
1
fore-and-aft
1
head on(verb, expression, adjective, phrasal verb)
1
inclined
1
linear
1
longitudinal
1
longitudinally
1
running
1
vertical
0
along
0
from top to bottom(expression, idiom, adverb, across, lengthwise)
0
perpendicular
11 years ago|561 views|share |citing 
APASmart Define. (2015). crosswise thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/crosswise/thesaurus/antonyms
ChicagoSmart Define. 2015. "crosswise thesaurus" https://smartdefine.org/crosswise/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, crosswise thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/crosswise/thesaurus/antonyms>.
MLASmart Define. "crosswise thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/crosswise/thesaurus/antonyms>