Answer:
lend, pretend, send, trend, spend, tend, bend, mend, fend, defend, offend, blend, commend, amend,
________
don't forget end, rend, render, rendition, wend, pend, tendril, gender, descend, ascend, vend, surrender, condescend.
You can have dozens more using prefixes like in:
misspend, attend, intend, unintended, undefended, recommend, transgendered
or suffixes like in:
lends, lending, lender, vendor, renditions, descedant.