Difference between Lasts and Penultimate

LASTS vs PENULTIMATE: NOUN

A next-to-last syllable in a linguistic unit.
The next to the last.
The penult.
The next to last syllable in a word
That member of a series which is the last but one; specifically, the last syllable but one of a word.
In whist and bridge, the lowest but one of a suit.
This sense?) A next-to-last thing.

Highest in extent or degree
Most unlikely or unsuitable
Occurring at the time of death
Lowest in rank or importance
Coming after all others in time or space or degree or being the only one remaining
Conclusive in a process or progression
Not to be altered or undone
In accord with the most fashionable ideas or style
Occurring at or forming an end or termination

Second last
Immediately preceding that member of a series which is the last; next before the last; being the last but one: as, the penultimate syllable; the penultimate joint. Compare antepenultimate.

Latter, Close, Concluding, Finale, Finish, Latest, Lowest, Finally, End, Penultimate, Worst, Final, Late, Later, Past

Seventeenth, Second, Thirteenth, Ninth, Eleventh, Fifth, Seventh, Eighth, Twelfth, Sixth, Final, Penultima, Penult, Next to last, Last

Unlikely, Latter, Close, Concluding, Finale, Finish, Latest, Lowest, End, Penultimate, Worst, Final, Late, Later, Past

Fourteenth, Fourth, Seventeenth, Second, Thirteenth, Ninth, Eleventh, Fifth, Seventh, Eighth, Twelfth, Sixth, Final, Next to last, Last

We are OK if the shutdown lasts a couple days, but if it lasts two weeks, that missing paycheck is a mortgage payment.
However, sometimes it may be difficult to determine how long an NDA lasts for, whether it lasts indefinitely, and your obligations when it expires.
Grant A lasts for one year, and Grant B lasts for two years.
It lasts and lasts and lasts and lasts.
Trucking school programs typically lasts about three weeks, while a program at a community college usually lasts about six.
The treatment lasts seconds, but the effect lasts the rest of your life!
Whole life lasts your entire life vs term life which lasts for a specific period of time.
This fragrance also lasts very long I was shocked how long it lasts compared to other expensive brands.
The Shard lasts approximately one hour, afternoon tea lasts around an hour and a half.
Hope the happy bat mitzvah glow just lasts and lasts.