drop-in
Casual, unscheduled visit
A drop-in is a casual, unscheduled visit, or a person who makes one: We had a few drop-ins at the party.
The adjective describes places or services that welcome people without appointments or prior arrangements, like a drop-in clinic or drop-in center.
In computing, drop-in refers to a component designed as a direct replacement for another, requiring no modification: a drop-in replacement for the old software.
Impromptu brief visit
- visitTrip to see another
- stopoverBrief halt mid-journey
- unannouncedWithout prior notice
- impromptuWithout advance preparation
spontaneous · brief · informal · unexpected · neighborly · social · guest · hello
Outpatient treatment facility
- childcareSupervision of young ones
- daycareChild supervision facility
- counselingProfessional guidance for problems
- tutoringIndividual academic guidance
shelter · services · walk-in · open-door · resource · support · outreach · community
Replacement for another
- fill-inTemporary substitute person
- stand-inTemporary human placeholder
- backupStored duplicate for recovery
- temporaryLimited in duration
interim · pinch-hitter · understudy · proxy · spare · alternate · reliever · sub
Requiring no manual configuration
- compatibleAble to work together
- interchangeableAble to replace another
- componentElement of a system
- insertPlace within another thing
cartridge · module · snap-in · prefabricated · ready-made · standardized · kit · retrofit
pop-in
Impromptu brief visit
- visitTrip to see another
- stopoverBrief halt mid-journey
- unannouncedWithout prior notice
impromptu · spontaneous · brief · informal · unexpected · neighborly · social · guest · hello · catch-up
clinic
Outpatient treatment facility
- childcareSupervision of young ones
- daycareChild supervision facility
- counselingProfessional guidance for problems
tutoring · shelter · services · walk-in · open-door · resource · support · outreach · community · sessions
substitute
Replacement for another
- fill-inTemporary substitute person
- stand-inTemporary human placeholder
- backupStored duplicate for recovery
temporary · interim · pinch-hitter · understudy · proxy · spare · alternate · reliever · sub · temp
plug-and-play
Requiring no manual configuration
- compatibleAble to work together
- interchangeableAble to replace another
- componentElement of a system
insert · cartridge · module · snap-in · prefabricated · ready-made · standardized · kit · retrofit · upgrade
- casual gatheringsget-together, hangout, meetup, catch-up, happy hour
- social visitsdinner party, house call, pop-in, playdate, coffee date
- Visitorsvisitor, guest, houseguest, house guest, invitee
- visitsvisit, visitor, visitation, pop in, pop-in
- in-personface-to-face, in person, meetup, real life, offline
- Skateboardingskateboard, ollie, skateboarding, kickflip, grind
drop-inappointment
Scheduled time for something
scheduled visit · by appointment · reservation · booked · prearranged
drop, inside, drip, dropped, drops, dropping, droplet, raindrop, dropout